> I'm putting some V-spar Flagship varnish on my Pygmy Coho. Just when I
> think I have it right, a sag develops in the night. I'm putting it on with
> a foam brush straight out of the can. I plan on using it for a boat, if
> you know what I mean, so it doesn't have to be a work of art. I'm not
> going to use 5 different grades of paper between coats (I use
> Scotchbrite), but I want it to look good. What's the secret to a sagless
> shine?

> Peter An old painters trick-add 10% Penetrol to the varnish a day in advance,and stir it in.Give a day to let any bubbles out,and it will go on smooth,brush out thin, and won't sag or run.Yacht finishers will let the varnish set a day or two, depending on the weather,and will then sand.The rule of thumb was to add a coat,sand off half a coat..to refresh the old finish,before it gets too beat up to renew,sand off a couple of coats,and put on 2 coats.With care,you can keep it up for 20 years without stripping.