I recently had to fill a split going right through the wood before turning, and made a terrible mess. I used regular (blue) masking tape to seal the underside before pouring in epoxy resin. It found tiny gaps and I spent far too long trying to collect the excess from below, dropping it back into the top of the split hoping it would eventually thicken enough to hold. Which didn't really happen.
I'm sure part of the trick is getting the underside smooth, but can anyone recommend a tape that would be good for the job of sealing the resin in before it cures?
Thanks, C