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Old 23rd January 2021, 17:47
Mitchelkitman Mitchelkitman is offline
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I'm also an advocate of brush painting. IMHO the most important aspect of making the primer 'stick' to GRP is the surface finish - 320 grit is my preferred preparation. Paint suppliers (who often know nothing about GRP anyway) state all sorts such as "you need plasticiser in the paint - that will be another £10 a litre please". Many years ago someone who'd painted his car said to me "just use red oxide primer". I was planning on painting the GRP 'bumpers' on my Dutton at the time. The Red oxide (follower by satin black) just using aerosols came out great, and gave no future issues. Ambient temp is also very important, much too cold at the moment!
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