Got a dry carbon piece. It was cleared once but had adhesion problems. I've gotten all the clear off without sanding it. Not sure if I should lightly sand it with ultra fine sandpaper or try adhesion promoter. I do not want/cain't mess up the weave on it. Any Ideas?

Since you've already had adhesion problems, I'd do both.
Lightly sand it with 800-1000 grit, to remove all gloss, and
then use adhesion promoter. Then clear it. That's about
all you can do....

When The piece got left with me. All the clear was off except in the tight areas. (nooks and crannies). For all I know somebody did it with a rattle can. May not have even cleaned the release agents off of it.
The piece is has no gloss. I don't want to use anything more aggressive than 1500 to sand it. Mainly don't know if I should hit it with Bulldog also. Never have used it under just clear. Always had base over it.
It being dry CF is what has me second guessing myself. That and there's not another one to be had.
It's a piece that was made to stick on top of a dash to give it that CF look. (I know)
It's thinner than the paper on a case of beer.

Wow that's thin; probably hard to work with. Are you sure it's true carbon
fiber and not just printed plastic?

I've used Bulldog on plastic panels under a waterborne clear, with no ill effects.
The panels still look new after a couple years, with no peeling at all. Bulldog
works very well on flexible parts. Try a small spot on the dash cover backside
if you're worried about a reaction.