fiberglass vs paper - revisited
Besides the greater tendency to crack, the fiberglass tape is just plain harder to finish in a corner. You're running your knife against the rough surface of the tape on the opposite side of the angle. Hard to get a smooth finish without extra coats and sanding. On a flat joint you don't run into the problem so much due to the tapered edge on the drywall. I guess you COULD use fiberglass in a corner. No matter where you use it, it is necessary to use a setting type compound on at least the first coat of mud. This will help to some extent with the cracking as it dries harder.
Toocheap, there is a paper tape that is "wet and stick". Saw it in a trade magazine somewhere. Have never tried it so couldn't recommend it. Not sure who makes it either, but a little searching on the web would probably get a result or two....
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