Matt (TexasKing) has been using the Optex and loves it. It mixes 4:1 so it's easier for someone new to this to mix. (no counting drops
) TK hasn't been posting much lately due to some health issues or he would give you the skinny on it himself. Irregardless of what PP you use you want to sand it with a coarse grit. I use Sunmight green film 120 grit sheetrolls. Any of the PP's will sand great with 120. Plus 120 levels much better than even 150 does. Important to sand as much of it off as needed.
Everyone keep TK in your prayers. He's a good guy.