Zar Ultra Max Semi over Cetrol CRD?
Yogi- i'm sure that both companies danced around because you we're using the Certrol beyond its intended use- and the Zar was not made or tested for this use. Im sure neither would commit.
Because you are in uncharted waters, it's hard to say what would happen. But if you are daring, give it a shot.
The Zar Max is my fav indoor waterborne clear- a joy to work with.
Do a test board ( or a unnoticeable spot on your beams)
If it isn't compatible it might:
Bead up or fish eye right away-
Turn cloudy when it dries
Delaminate- and this is the hard one- could happen later.
Let us know what happens- GL
"It's better to come here with questions before you screw up than to come here after and ask how to fix them."- JS