Originally Posted by cjd

You will have to use a drift and hammer. A hammer alone does not have the control to prevent denting the rocker. Once straight, the seam can be ground smooth, so the mars won't show.

The outer rocker sill panel can be replaced, but bonding aluminum is a specialty job, that only a handful of shops in the country can deal with it right now. Definitely not a do it yourself job! Now that the F150 is aluminum, there may be more shops soon that are prepared to mess with aluminum panels.

Originally Posted by ym37tech

I've never had to do this on a Jag, but I have other cars. I use C-clamps and 2 pieces 1 inch square steel tubing. But the sill in between the two pieces of tubing and tighten the clamps down, it will straighten out all of the "waves". You can use progressively longer sections of steel to true it all up. I never have used any heat on it, but that doesn't sound like a bad idea.