Whats best way to remove inner fender panels

[green69rt]

And obviously you cant get to all the rust in the cracks along the mounting brackets etc...how would you guys deal with prepping this?

Sometimes there is no good answer.  The ultimate answer is to have the whole car dipped but many of us can't or don't have anyone close to do it.  In that case dig out what you can, try to spray phosphoric acid into the cracks, let dry or heat up to dry the crack out.  Then maybe something like Chassis Saver to push in where you can.  Then it's "hope for the best".  If you can keep any more water or oxygen out of the crack the rust should not progress very fast at all but it's kind of a chancey thing.

[richRTSE]

Well I guess I should have said spot weld with a mig welder?

I think you mean plug weld.   

[hemi-hampton]

Well I guess I should have said spot weld with a mig welder?

Yeah, Thats what I thought you meant