
Originally Posted by
Ronf
S-C,
I applied 2 coats of metallic base using the 1.3 tip at about 5-6" DTP, followed by a final bc drop (fast and furious, again w/1.3 tip) at about 8-10" from surface to evenly disperse the metallic over the panels. Drop coat helps ensure I don't leave any tiger stripping on the panel I might miss in the booth as well as makes the metallic evenly dispersed and pop. This was followed by 2 medium coat applications of inter coat using PPG DBC500 cut in clear which is nothing more than a base pigmented, non-metallic, cc with pearl mixed in using a 1.2xl tip (1.3 tip would have been just fine). Finally, 3 coats of PPG DCU 2021 cc was applied using the 1.3xl tip and clear cap.
I always use hardner in all materials when shooting a tri coat. I mix 5% RTS catalyst for base and mid coats and finish with cc mixed at the recommended ratio according to the TDS. While the hardner is not required for base and mid coat, I prefer to use it.