: I am trying to get a really good varnish job on my new Return but I
: always seem to find a run or sag someplace. Is there a way to
: sand or scrape them out and not have to redo the whole boat? I
: may end up with the infamous 6 coats. Joe

Here is a link to a link. The second link is on how to polish varnish with automotive polishing compound. From first hand experience, I do not recommend polishing. It will create beautiful results but is not worth the effort for a working boat. Touch up then beat up is my perspective now.
http://www.kayakforum.com/cgi-bin/Building/index.cgi/page/1/md/read/id/169280/sbj/polishing-varnish/