The procedure you found is correct. However, I'd use the adhesion promoter as it's made to be compatable with the paint. Also, the clear coat is a much harder finish than the wheel paint by itself. If you want flat or matte finish, you can always spray the clear and then sand it to a matte finish with 600 or 800 paper. We've painted several sets of wheels with the Duplicolor system and had good durable results- even on a set of track wheels that saw a lot of heat and hot brake dust.
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