I used Raka no-blush on a stripper this year. I used Z-spar Captians. I think any varnish will do. Even though it's a no blush, I still wait a good two weeks for the epoxy to fully cure and wet sand it to remove any possible traces of blush. I think most of the (compatability) problems you hear of, have to do with blush and epoxy that's not fully cured. Epoxy releases gases while curing.