so far nothing has worked. been super busy with work but have used penetrating oil which really messed up the dip/coating, and have procured a t-wrench also. still at it, going to try heat and cold this weekend along with some Kroil.
Redip will be cheap if you get the tube out.
Tarjac would be my recommendation for that if you want to have it redone.
What choke is in it now? Any chance you can measure the I.D of the choke to see if it's possibly swollen?