I would try some lacquer thinner covering the goo and let it sit from 5 to 20 minutes and see if it will fallout or scrape out easier twocents
I remember faintly someone doing that years ago but I can't remember the details now confused

Last edited by Cab_Burge; 10/05/22 11:54 PM.
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)