[DAVID GAGNARD]

You only need enough of the base coat to cover the sealer,depends on the color has to how many coats of base color is needed.....
once body work is done, car should be primed and blocked and primed again. Then wet sanded,then sealer is applied, then painted....
Depending on what your looking for in a paint job,2 double wet coats of clear should be enough for all except a top quality ($$$) show car paint job...

I'd be more interested in your bodyman's expirence in working with glass cars/boats...one whom has done a number of glass cars and boats would have a better handle on how to do it as opposed to someone that has never done any work on glass cars......
If someone has little to no expirence in working on glass cars, they can ruin a body with DA sander in a little while, same goes for sanding fiberglass, one must have some expirence to do it properly........
David