Check with Morgan Sparks, from Cameraleather.com. The method he recommends to remove it from Leica bodies is with paint and varnish remover with a certain component (chloride), in a thick emulsion so it clings to vertical surfaces.
Now... if you're intending to do the procedure on the QL17... is that the G-III or not? The G-III has a small sign on the front that you may want to keep or remove.
Check Morgan's site at
www.cameraleather.com and have fun looking at the pics!
🙂