I recieved my cowl repair panels from Chevy Duty and am ready to get to work. I got the full outside piece that goes all the way to the soldered joint, and my question is-How do you go about removing the solder, do I just take a torch to it? Will that affect the base metal? I don't want to goof anything up. I'm sure I'll have questions about filler material later but I'll aross that bridge when I get there. Thanks.