I have put 2 coats of coating epoxy onto marine ply.

Then I applied one coat of Epifanes varnish 48 hours ago. The varnish is not drying.

Is there an incompatibility?

Should I wash the epoxy coating, as I have read elsewhere?

One professional adds cobalt drier to the varnish to fix the problem. Do you know about this?

I have only used a test piece of plywood so far. Also a narrow strip of pine (same problem).

Thanks

You would need to check with the manufacturer of the varnish for epoxy compatibility.

Generally all you need to do is give the epoxy a light key with sandpaper then a clean to remove any dirt/dust or greases and it will be fine for painting or varnishing.

Warren Penalver
Easy Composites / Carbon Mods - Technical Support Assistant