I need to use a patch panel on my rear quater panel in front of and behind the tire and tips ??

 

Be sure to cut out all of the rust about an inch either side of it...
o you have acess to a plasma cutter? if not I recommend a very sharp pair of tin snips... also be sure that when you button in the patch panels I would recommend 3 sided magnets to help hold it in place or some body panel clamps.. Also when your welding in the new patch panels be sure to tack weld it in in a criss cross pattern VS welding it from one end to the other... The whole idea is to not warp the new patch piece... by doing criss cross pattern of tacks ...that will eliminate any possibility of warpage...

Hope this helps...
I'm sure others will chime in with other helpful hints/ideas

Personally I have never done it myself...
Maybe checkout youtube for some helpful info as well..