[jazzcornet]

we have constantly been asked how we prep our parts for coating so im going to give a little insider.

first we start with a hot tank degreasing. it's nothing more than a ratio of purple power degreaser and water heated up to 140 degrees farenheit. we let it soak in there for about an hour. then, we remove the oil baffles and let the baffle plates soak longer while we blast the valve covers. we first blast it with 15/30 grit silicone carbide which removes all the greasy and brutal gunk that has been soaking on it for the last 16 years. this is followed by a 70 grit aluminum oxide and finally a 300 grit glass bead. at this point. if the substrate still has impurities of really bad pitting, we may or may not go back to square one and start with files and/or a power sander. after the sanding, we rince it off with water and blow it dry with clean compressed air. once it is completely dry, we outgas it at 500 degrees for 90 minutes. before we give it a chance to cool off, we spray it with denatured alchohol and let it evaporate dry. the substrate is now ready for powder. here are some pics of a valve cover after prep and ready for powder!