Anytime you're applying fiberglass cloth to a reasonably level surface, a plastic spreader or squeegee is the way to go. Just dump the resin onto the surface and spread it around quickly with the squeegee. Keep spreading the resin until the surface is no longer shiny but shows the texture of the fabric. Excessive resin left in the fabric will cause it to float up and you'll have to sand those bumps off later.
A carbide or tungsten blade scraper should be used before any sanding after the resin has cured. It takes off the high spots and doesn't make any dust.
Tomorrow I'll turn the hull over and prepare to glass the bottom.
I now have a powerful stereo system in the shop and it seems to be making me work harder, I should have had it in there long ago.