I am gearing up to sandblast and repaint a combine and have a few questions about the Omni line of paints from PPG.I reciently used Omni regular primer and paint to repaint a tool bed for a truck and was VERY pleased with the results.The question I have is that after sandblasting the combine and priming with the MP170 epoxy primer does it have to be sanded before I can spray my color or does it go on smooth enough to paint without sanding? After priming my tool bed it was kind of rough so I wet sanded it with 1500 grit paper and wound up with a nice mirror finish after the color dried.My concern is that there will be lots of places on this combine that will be awfully hard to sand if the primer does not go on smooth.This will be an every piece apart totally complete restoration and even though this paint will cost me a small fortune I would rather use good paint if I go through all the time and labor to do it.The Omni single stage paint I used on the toolbody is super tough and you really have to work hard to chip it so it should last a long time on a combine. Opinions please!