I'll just say Bernz-O-Matic. I had heard of the candle method but never found any videos demonstrating the steps. I fully disassembled....fired up the torch....heated for a few minutes slowly...rolled the backstrap. And continue until you get it down to where you desire.
Will this melt the exiting stippling? Yes
Do you run a risk of altering the magwell? Potentially, I inserted my mag before rolling the shape.
Should you plan on fully stippling the grip? Yes
Does it take a high IQ individual to complete? No
Send me your email and I'll shoot a picture if you are interested.