Prepping parts for Clearcoat


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ECV3
ECV3
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What grade of wet and dry paper or what colour scratch pad is used to give a prepreg part a key ready for clearcoat ?.

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Hanaldo
Hanaldo
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Depends on the coating system. I use Duratec Sunshield, which is a high build coating and fills scratches really well, so for that you would use 120-180 grit. 

For regular coatings though, that is EXTREMELY course. So if you are using a regular automotive paint, then you'd want to be scuffing it up with 600-800 grit. I've seen people use as high as 1200 grit, but I would be questioning how good the mechanical adhesion is with that level of key. 
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