I'll add in on the engine stands for a mini-rotisserie. The 5 degree upward tilt works OK, but you will get some wheel lift and instability at some positions as you rotate, so be ready to move through those positions quickly. I never felt that the frame was going to hit the floor, but it gets a bit dicey as you go through frame vertical. If I do another one I will get a second stand of my own (as opposed to borrowing one) and will cut & re-weld the top pipes level to eliminate the dancing.

I sprayed my bare frame down with WD40, too, and I agree with Dave 100% - before you start sanding get the WD40 off or you will push the silicone down into the metal surface with the sanding. Any hint of silicone will create fisheyes in your primer & paint.

I used single stage for a couple of coats, then on the final coat mixed single stage & clear 50/50 - my paint guy calls it "sugar coat" and says it gives the benefits of clear without the difficulty. It laid down like single stage, but glossed up really nice. I will use the same finish on the body.

I also agree on the full assembly comment. Nothing worse than getting that paint done, wet sanded & polished out only to find that you need another bracket welded somewhere.