Sorry, I have been trying to post a picture for days. Thought I had succeeded. The picture is on Picasa. The URL is https://lh6.googleusercontent.com/-5X3p0XREEaI/UAtTeTxZZrI/AAAAAAAAADs/8Nh-Le5Br5o/s128/IMG_3514.JPG. For some reason it doesn't work, thanks to previous replys. I have used "copy link location" pasted it below, provided the password. a Preview shows "invalid file format" but you can see the URL is for a .jpg. What else? A picture is worth more than all this talk.

: I need some help from the expert, guru (know - it- all) most
: respected persons on the web.
: Really, this is the best place.

: I have built 2 Yost SOF boats and when coating the skin with one
: part polyurethane (Minwax Helmsman) I get irregular blotches
: where the skin touches the frame.
: Dacron 8oz from Dyson over a varnished (Minwax again) and waxed
: frame.
: The first boat it was apparent I left drips and thick areas which
: then penetrated the cloth causing blotching.
: Second boat I did some test panels which did not blotch and thought
: that just making a thin first coat would work.
: Unfortunately the instant I started applying the urethane (brush)
: small local areas blotched and over the course of the complete
: coating perhaps 5% of the frame area blotched - showed a much
: darker color where the coating soaked all the way thru and
: contacted the frame (I assume).

: Any suggestions? I see perfect coatings on the boats in Yost's web
: site. I was looking for the translucent color. The first boat
: had no additional color, the second had a light tint mixed into
: the clear varnish.

: Any help would be appreciated - If I try this a third time I would
: like a reasonable chance of success. I could always paint a
: solid color, just didn't want to.

: Thanks, Marc