Best plastic primer in this set
Updated: 23 October 2026
You want one name to buy, and the largest review count in the folder belongs to a miniature spray while the cheapest grey aerosol carries a polyolefin exclusion on the maker’s sheet. Best plastic primer, on this page, means two picks with a skip line, not a single winner for every plastic. Best value for a rigid plastic that Hycote’s sheet allows is the £7.99 XUK612 can. The best documented miniature route is the Army Painter matt white spray when you can work outdoors in mild air, or Vallejo when you have to stay indoors with an airbrush. Skip both if the part is polypropylene or PLA. Shelf prices and the full nine rows are on the [plastic primer comparison](/hub/paints-and-varnishes/plastic-primer). The Products Compared editorial team wrote this on 21 October 2026 from the saved amazon.co.uk listings and the makers’ pages. We did not run a lab test. A qualifying purchase can earn a commission at no extra cost to you.
You want one name to buy, and the largest review count in the folder belongs to a miniature spray while the cheapest grey aerosol carries a polyolefin exclusion on the maker’s sheet.
You want one name to buy, and the largest review count in the folder belongs to a miniature spray while the cheapest grey aerosol carries a polyolefin exclusion on the maker’s sheet. Best plastic primer, on this page, means two picks with a skip line, not a single winner for every plastic. Best value for a rigid plastic that Hycote’s sheet allows is the £7.99 XUK612 can. The best documented miniature route is the Army Painter matt white spray when you can work outdoors in mild air, or Vallejo when you have to stay indoors with an airbrush. Skip both if the part is polypropylene or PLA. Shelf prices and the full nine rows are on the plastic primer comparison. The Products Compared editorial team wrote this on 21 October 2026 from the saved amazon.co.uk listings and the makers’ pages. We did not run a lab test. A qualifying purchase can earn a commission at no extra cost to you.
Our top picks
| Badge | Product | Job | Volume | Dry time | Note | Price | Offer |
|---|---|---|---|---|---|---|---|
| Best overall |  Vallejo Vallejo surface primer, grey, 60 ml | Airbrush primer | 60 ml | 3 hours | 7.6 | about £8.06 | View offer |
| Best value |  Hycote Hycote grey plastic primer, 400 ml | Car plastic primer | 400 ml | 24 hours | 7.9 | about £7.99 | View offer |
 The Army Painter Army Painter colour primer, matt white, 400 ml | Model primer | 400 ml | 1 hour | 8.0 | about £11.99 | View offer |
On this page
Best for which job
Best without a job follows either 11,306 reviews on a matt white hobby spray or a 5.0 from three reviews on a grey can. Neither of those is a criterion. The criterion here is the plastic in your hand, then the review sample for that kind of product.
For a car-shaped job, the plastic has to be one Hycote’s sheet allows: rigid plastics, including the way many people use a grey primer on bumpers and wheel trims, then a rule-out for polyolefins, flexible plastics and polystyrene. Polyolefins include polypropylene and polyethylene. If your cover is in that excluded group, this page’s value pick is the wrong can. If the plastic is allowed, best value means the lowest price with a large United Kingdom review count, not the highest star from a tiny sample.
For a miniature, best means a film thin enough to leave edges, with a route for a dry day and a route for a wet yard. That is a different product from a high-build car aerosol. A display score of 80 against 79 does not settle it. The 80 sits on the Army Painter colour primer because 4.5 from 11,306 is the deepest sample in the set, and that count is a miniature primer, not a bumper test. The 79 sits on Hycote. We are not claiming a personal spray-out, a weathering trial, or that either pick sticks to every plastic sold in the UK.
Grey aerosols in this set
Hycote B003MI8996 is the best-value grey aerosol here when the sheet allows the plastic. It is 400 ml, model XUK612, £7.99, 4.6 from 1,410 amazon.co.uk reviews. United Kingdom reviewers use it on roof boxes, slot-car bodies and models. They also mention a strong smell, a fast spray that can hide detail, and a reaction when the next product went on too soon. The maker sheet asks for two or three light coats, about 15 minutes between them, and 24 hours before later finishes, from about 20–25 cm after a two-minute shake. Skip this can for polyolefins, flexible plastics and polystyrene, and skip it if you need a thin miniature film. Bumpers on the product page does not cancel the exclusion.
Autotek B005QJWNAA is the alternative when you want the waterproof flag and you can live with a heavier film. It is 500 ml, model AT00PPG500, £9.94, 4.6 from 895 reviews. Tetrosyl describes it for metals and rigid plastics. United Kingdom reviews praise wheels and other plastic items, and they also say the coat can be heavy and need flatting. On flat models it runs and streaks, which is why it is not the miniature pick. Item weight prints 48.5 g against a 500 ml can and a 460 g size line. Ignore 48.5 g. You pay about £2 more than Hycote for 100 ml more and a waterproof line that Hycote’s listing does not give you cleanly: Hycote says water resistant and also sets Is Waterproof to false. It is still not a polypropylene approval.
Simply Auto B0GNYRSH9J is not the pick. It is 500 ml at £8.99 with 5.0 from 3 reviews, and the special features say adhesion promoter. The file has one United Kingdom review, about bonnet grills under gloss black. Full cure is not stated. A half-hour dry time is not a reason to prefer three reviews over 1,410. If the moulding is polypropylene, do not upgrade from Hycote to Autotek or Simply Auto inside this table. Leave the grey cans and read the bumper page before you buy a clear promoter from a motor factor.
Miniature primers in this set
Army Painter B005WH3Z12 is the miniature pick when you can spray outside. It is 400 ml of matt white, model CP3002, £11.99, 4.5 from 11,306 reviews, made for metals, plastics and resins. The bullets say 15–20 cm and short bursts, and they tell you to avoid extreme heat, cold and humidity. The listing prints 1 hour dry and 2 hours full cure, and it says the primer is not water resistant. United Kingdom reviewers talk about covering figures, including a Spearhead-sized force, and about a film that survives handling. They also report a nozzle that had fallen off and a dry time longer than some other primers. The maker’s own guide still says outdoors, a minute of shaking, thin coats, and hours or overnight, which is a more cautious clock than the two-hour field.
Vallejo B005HXHNPA is the better miniature pick when it is raining and you already own an airbrush. It is 60 ml of grey, model VJ73601, £8.06, 4.6 from 2,030 reviews. Surfaces include resin, PVC, brass, white metal and wood. United Kingdom reviews describe indoor use, little thinning and an even coat. One review says it did not stick after soap and isopropyl alcohol, so prep still matters. Dry time is 3 hours and full cure is 4 hours, and Is Waterproof is true. Sixty millilitres is a figure bottle. It is a poor way to buy a bumper coat, and it is a fair way to prime a squad without standing in a wet garden.
Nicpro’s three-colour airbrush set is the volume alternative, not the default pick. At £14.99 you get black, grey and white, about 250 ml each, with 4.4 from 612 reviews. The bullets say ready to spray and also say to thin the primer if airflow is under 20 litres per minute. UK reviews disagree about how watery it is. Use it when you want all three colours and you will test a spare piece. The 11,306 reviews do not win the bumper job. That sample is people priming models.
Rows that are not the pick
Montana B00L3NMVDW is not the premium pick just because it costs £13.95. The star line is 4.0 from 123, the weakest among the grey aerosols, and the written reviews in the file are labelled United States or Australia rather than the United Kingdom. Those texts include nozzle trouble and a PLA adhesion miss, and they also include people who liked it for craft work. Montana’s own page does name modified polypropylene blends and excludes HDPE, which is a more specific list than Hycote’s. That list is a reason to read the can if your code matches it. It is not a UK bumper test, and a higher price is not a higher score. Coverage is printed at about 12–15 square metres, which is a maker figure, not a measurement we made.
The Army Painter 100 ml matt black bottle, B09RSKLJZM, is not a third miniature winner. The title says airbrush primer. The bullets describe a thinner. At £11.50 and 4.5 from 407 it has a real audience, and that audience does not agree. Some UK reviews like it unthinned. Others describe clogs, scratches unless you wait, and wipe-off on PLA. Buy the 400 ml colour primer, or the Vallejo bottle, if what you wanted was a primer with one job description.
Nicpro white gesso, B0F3BT5TLT, stays out of both picks. It is £14.99 for 513 ml, 4.6 from 189, and plastic is one surface beside canvas and paper. One UK review likes it as an undercoat for painting plastic. It is not water resistant, the gel is described as very thick, and it is not a car primer and not a figure primer that keeps edges. If you are painting a board or a terrain piece, the comparison row is enough. It should not be in the basket next to a bumper.
Common questions
What does best mean on this page?
Best means the strongest match in these nine listings for a stated job, with a reason to skip it. For rigid plastic that Hycote allows, best value is the £7.99 grey can because of price and 1,410 reviews. For miniatures, best is the Army Painter 400 ml spray on a mild dry day, or Vallejo indoors with an airbrush. It does not mean a lab ranking of every plastic primer on amazon.co.uk.
Which grey aerosol is the best value when the plastic is allowed?
Hycote XUK612, 400 ml at £7.99, 4.6 from 1,410. Autotek is the step up if you want 500 ml and a waterproof flag and you will flat a heavier coat. Simply Auto is cheaper than Autotek and has only three reviews, so it is not the value pick. The Hycote sheet still has to allow your plastic.
Why not Simply Auto at 5.0?
Three reviews can all be five stars and still tell you very little. The saved UK text is about bonnet grills under gloss black. There is no full-cure time and no large sample of failures or successes. Hycote’s 4.6 from 1,410 includes complaints you can plan for, which is more useful than an unmarked 5.0.
Why not Army Painter matt white as the overall best?
It has the highest comparison score and the most reviews, and those reviews are about miniatures. The can is not water resistant, the rank is in model primers, and it is the wrong default for a bumper or a wheel trim. Use it as the top pick for figures you can spray outdoors. Do not let the review count cross over into car plastic.
When is Vallejo the better miniature pick than the spray?
When you cannot spray outside. UK reviews describe airbrushing it indoors in poor weather. You need an airbrush, you are buying 60 ml at £8.06, and one review still failed to get adhesion after soap and isopropyl alcohol. On a dry, mild day the 400 ml Army Painter spray covers more figures for £11.99.
Who should skip Hycote even though it is the value pick?
Anyone whose part is polypropylene, polyethylene, another excluded flexible plastic, or polystyrene. Also anyone who needs a thin film on a miniature: UK reviews already say the spray can hide detail. A roof box or a rigid trim on the allowed list is the case where the £7.99 can earns its place.
Is Montana the premium pick because it costs £13.95?
No. It is the dearest grey aerosol here and the star line is 4.0 from 123, with review texts that are not UK-labelled. The maker’s surface list is worth reading if you think you have modified polypropylene. Price alone does not make it the better can than Hycote or Autotek for a rigid plastic those sheets already cover.
Related pages
Sources
Public sources from the research digest, last checked on 22 October 2026. Shelf prices and star lines are the amazon.co.uk figures in the display file. The price band is this set, not a market average. No listing was lab-tested.
- VOC in Paints, Varnishes and Vehicle Refinishing Products Regulations 2012 (retrieved 22 October 2026)
- SI 2012/1715 Schedule 2, VOC limits (retrieved 22 October 2026)
- HSE: vehicle spray painters and COSHH (retrieved 22 October 2026)
- HSE INDG388: safety in isocyanate paint spraying (retrieved 22 October 2026)
- Hycote plastic primer technical data sheet (retrieved 22 October 2026)
- Montana: how to use plastic primer (retrieved 22 October 2026)
- Army Painter: using colour primers (retrieved 22 October 2026)
- Tetrosyl: Autotek grey plastic primer 500 ml (retrieved 22 October 2026)