Is System Three compatible with Interlux?

Laszlo

I had a similar experience with a polyurethane I used from an older can with a much used and dented lid.   It did not cure as quickly as usual.  My best guess is that the volatile spirits in the poly evaporated from the can thereby slowing the curing once applied.  It did cure with more time and I actually still use the poly (for less sensitive projects) by adding mineral spirits to the poly with good results.

After forty something hours, it never really ended up right so I sanded it down.  I laid a coat of the original gloss tonight and I am hoping that things work out ok.  Very frustrating to get this far and run into a roadblock like this. I'm out of gloss so it has to work!

Laszlo, to answer your question above....I purchased the Interlux and Syatem Three varnishes at the same time from CLC. They recommended these two and as the experts, knowing what I planned to do with them, that they provided compatible products. A follow up call with Joey this week didn't raise  any concerns about compatibility either.

At Joeys recommendation after explaining the trouble, I took the boat outside and let it sit in the sun and unfortunately that didn't seem to improve the curing process either.  However, it was the first time it had been in natural light and seeing it in something other than fluorescent light  brought a smile to my face.

Were your gloss coats completely dry? I've had trouble a few times when volatiles get trapped by the next varnish coat which makes for a slow drying sticky surface.  The other problem I've had with satin varnish, is I didn't stir it enough and that seemed to slow up the cure time.  Just some thoughts. Good luck,  Ken.   

   I think the problem was some type of bad reaction between the two types of varnish. I've added two layers of gloss and it looks good and is setting up nicely.

Thanks

John