I'm just completing ,for a customer, a reproduction of a 1926 "Baby Buzz" or "baby-step" racing runabout.Built with West System epoxy,the interior of this little boat is an intricate grid of frames,stringers etc. and sanding between coats of varnish is just not viable,nor is brush application,and the dry time of varnish,especially during this cool,wet summer we're having is slow,to say the least.This has led me to settle on a 2-part automotive acrylic urethane as the clear-coat alternative to varnish-the stuff is made to be sprayed,doesn't need sanding between coats,contains UV filters,remains flexible,and can be recoated every 10 min. or so.I especially like the fast-dry aspect as dust is a problem in my small shop(but where isn't dust a problem?)It looks good over sanded epoxy too,of course.Only downside is cost-about $160Can/gal.-and safety(flammability and toxicity),but the labour savings in this case are huge and the end result much better,and if one is set up for spraying the safety issues are manageable.I ran this idea by tech-types at both the paint manufacturer and Gougeon Brothers and they don't foresee any problems.So,another day of prep and I'm gonna be spraying-I may never use varnish again.
I'm sure I'm not the first to use this sort of finish method but thought I might as well mention it here, especially after reading the various posts on varnishing and it's many delights.This is my first post here by the way,any comments or suggestions are welcome.