Epoxy/cloth laminate blister remedy?

I've been applying a cloth/epoxy laminate layer to the sidewalls and am having some problems. One is the challenge of working on a vertical surface. I don't recommend that approach and mention it for reference.
The other problem is that once the epoxy has cured, I'm noticing some surface blisters. They were not evident after I brushed on and then spread the epoxy, but that may have been due to a combination of poor eyesight and poor lighting. What caused them to develop remains a mystery. However, they are there and now I'm faced with what to do about them.
I'm contemplating using a razor knife to cut the blister out and then applying a cut-to-fit patch, round patches of various diameters. On the upside, the camouflage pattern cloth I'm using reduces the challenge of blending in a patch.
Any suggestions?

The other problem is that once the epoxy has cured, I'm noticing some surface blisters. They were not evident after I brushed on and then spread the epoxy, but that may have been due to a combination of poor eyesight and poor lighting. What caused them to develop remains a mystery. However, they are there and now I'm faced with what to do about them.
I'm contemplating using a razor knife to cut the blister out and then applying a cut-to-fit patch, round patches of various diameters. On the upside, the camouflage pattern cloth I'm using reduces the challenge of blending in a patch.
Any suggestions?