Hi,
I have the following situation: a nearly mint condition celluloid barrel attached to a broken ebonite grip section. I have an original NOS spare section prepared.
Is it possible to somehow unscrew the broken grip without damaging the original barrel, or such success stories just happen to be urban legends?

I have unscrewed a number of good grips from previously damaged barrels so far, so I didn’t have to take extra care for preserving the celluloid. I also know about some rosin threading sealant they used to put in there 80 years ago, which tends to make celluloid crystalized and brittle.

I know this can be a tedious and tricky work with uncertain outcome, also that some exact temperature has to be attained and kept during the procedure. Can anyone who has gone through this procedure successfuly please give some exact advice?

Thanks in advance!