you have got to be kidding, this topic comes up every other week... OR MONTH. there is much discussion everytime. but the out shot is, propane is hot enough. however, the heat will destroy the paint job. some will say to use a cuttung device (roto tool) instead. other will say to leave it alone unless you are so into the looks part of things that you must do it. I believe most conversion riders, leave them the heck alone.
btw; the bottle cage stuff is actually removable, but will leave you with a hole in the frame (for each nut removed)