I tried using the single stage chrome powder on some motorcycle engine covers, but alot of spots formed during the cure-out period. Can anyone tell me what causes these to form? I am attaching a picture of what I am talking about.
In prepping the covers I degreased them, pressure washed them, bead blasted them, used a pre-paint oil/wax remover, and then heated them in the oven at 500 deg. for 1 hour and let it cool off before I did the powder coating.