I used the purple dust control to install rounded bead on existing painted walls ( I removed the old square bead and replaced it) Everything was going just fine, until I went to sand after the final coat. Certain areas cured so hard that coarse grit sanding blocks wont take it down. These areas also cured with a high gloss sheen. Weird. I usually just board, but this job was too small to involve a taper.
What the heck is going on here? Any ideas?
What the heck is going on here? Any ideas?