Ah the pinhole hate dance!
I know of three ways to deal wit6h it.
The first is to use the best tool in the shop, the check book, and have some other poor bastard do it.
The second technique is to spray a film on the surface watch the pin holes appear and then wipe it with a hard rubber squeegee. This, in theory, pushes the clear coat into the pin holes. If you squeegee carefully, you can do the paint squeegee cycle until there are no more pin holes, and then proceed directly to building up your finish film.
The third way that I know of is to drown the surface, and then to dab globs into whatever holes still are open. After this mess cures, sand most of it off and spray the final coat.
I have had reasonable kick recently doing wet layup with nomex, but because I have been building A Cat hulls this way, the resin content can be higher than it would be if one were swinging for he absolute minimum weight. http://www.youtube.c...h?v=mROBlWIu8q4
this link shows how some of our usual suspects have done it.