I finished my Shearwater with 3 coats of Schooner varnish and called it 'done' in my excitement finishing the boat in time for nice weather. Went paddling for 3 trips, hours at a time, very kool.
Then I hurt my back (doing something else), so I decided since I can't go paddling for a week or so to strip off my deck rigging and continue varnishing and wetsanding.
The finish is in my opinion getting worse, not better, from air contaminants settling on it and from the varnish being to thick, now that I am getting a feel for working with this stuff. There is always a small spot or two I miss somehow when it is too late to go back over it. I know something only I will ever see but it drives me crazy anyway sometimes.
Anyway, what products are you guys using to thin out your varnish and how much would you add to a quart to get the right consistency to make it lay out better?