Fiberglass Tape For Mud

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I've heard good things about the fiberglass drywall tape, so I decided to try it. It's good stuff.

But here's the problem. I don't seem to be able to mud it without the web showing through. Is there some sort of new technique to go with the new tape?

I mud, scrape, embed the tape. Then I mud and scrape again.

I mudded and scraped half a dozen times over the tape and the web still shows in a couple of spots. Fortunately, when I mud, there isn't much sanding to do, because if I sanded, the whole tape would show.

This is a patch, so the edges don't have the recess for mud that are on the edges of a whole drywall sheet. Perhaps the only problem?

Any suggestions? Anyone know the secret? I'm going to do a bit of sanding, apply a can of spray-on boogers before I paint. Maybe I can see the web because it is a different color, but I hate to get it painted and have spots of waffle pattern in my ceiling.