I'm trying to get the last few coats of varnish on my Chesapeake 17, but each time I continue to get tiny little 'bubbles' in the finish. First I thought it was dust, but now I'm sure it's not. There's no way there could be that much dust in the air with the precautions I've taken. What am I doing wrong? Here's my process:
(working in floor to ceiling plastic-enclosed/taped booth in garage)
wet sand previous coat with 400 grit
clean with sponge and completely dry off deck with lint free paper towels. Wait about 15 minutes
vacuum thoroughly (vaccuum is outside booth). Wait another 15 minutes.
clean deck off with Interlux 333 brushing liquid, applying with link free paper towels. Wait another 15 minutes.
strain interlux schooner into clean paint cup.
With clean foam brush, brush on accross boat and tip finish parallel to grain, working in 18" sections. Very thin coats.
Painting conditions are more or less optimum with 60-75 degree temps and little moisture in the air. I'm thinking that either the boat has residual moisture from the wet sanding, or the brushing liquid is contaminated or something. Anybody have any thoughts? I have 5 coats on it now, and I just can't live with the last coat as my final finish.