Nope, just coat and cure the chrome powder like normal, and allow part to fully cool. Then coat with clear and cure again just like normal. No scuffing necessary. If properly cured, the first (chrome) coat will not re-melt, and the second coat (clear) will cure perfectly right over the top of it.
I've screwed up (missed spots) on parts and had two and even three coats of powder on a part. Don't re-prep the part, just coat again and cure like normal. Don't wait a few days though... when you notice a missed spot, recoat the whole part again and cure. It works great for me. That's why powder is very "forgiving".
Hemi-T
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