PPG OMNI MP182 Surfacer

Watch your time after mixing with the hardener. It has a one hour pot life and they mean it. I was doing a full four-coat process today at 68 deg F using the slow MH166 hardener. The tech sheet says 10-15 minutes flash between coats. I like to allow a liberal flash time generally so I tend top go for more like a 20 minute flash. That's really pushing it to the limit on pot life as I found out. The last coat was noticeably thicker and caused a dimished fan pattern. The leftovers will be jello in another hour :o). You'll also want to disassemble and clean your gun as soon as possible after that last coat.

Rod

As a side note, I am dealing with pits right now on my AC-B fender. I think I underestimated the depth of some of them. Fours coats of 182 did not fill them all in. I applied another four coats after sanding and that seems to be enough although I have now cut through in a few places and will have to apply another final coat prior to topcoating. I should of (remember that I coulda, wouda, shoulda thing) used 2K finishing putty over everything first. Pits are a time-consuming pain to mess with. If you are dealing with pits, the 282 probably will get you there faster, with fewer coats, as long as you don't use the reducer. Just watch that even shorter pot life.