[QUOTE=SCHOONER]Is it best to cut the new panel first ?
Then match the newly cut patch panel against my fender and draw a line with either tape or a sharpie pen?
This way I have a perfect match to butt weld the joint?
And lastly, Isn't best to cut as least as possible on my fender, just a couple of inches up from the rust?
Your plan is sound for the most part. Be sure you are able to access the cause of the rust in the first place... In some cases it is best to change a whole panel to be sure to get at trouble that is lurking behind inner panels etc..