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TAguy16
I disagree with your last statement because I have a lot of skill and experience doing metal work in the restoration business I've been running for the last 20+ years. Without seeing the work I've done in person (which has won my clients awards at shows, one a national show) you shouldn't have made that last statement. I think you owe me an apology for running me down like that (but I doubt I'll get one).The first thing you need to do if you want to salvage this panel is to strip it down to metal. Start over. Look at it, study it. See what is going on. If its oil canning it could be stretched or it could be oil canning from you shrinking an area too much. This is a oversimplification but if it is doming that would indicate stretching. If it is sinking near an area that you shrunk that would indicate overshrinking. Doming type stretching you need to do a series of gentle shrinks. Using the stud gun shrinker and cooling it is the worst way to shrink a panel. Quenching it work hardens the metal. Try using a torch or heat the area with the stud gun and use light hammer blows to shrink it. You can back it up with a dolly but is is not actually neccesary to do so. Overshrinking an area can be corrected by hammering on dolly. This will stretch the affected area and bring it back up. Work the metal to repair it, filler should only be used when you correct the problem(s).
I would argue that using a inline sander on a loose panel is much harder than a long block (17 inches+) Not trying to be harsh, but judging by your comments this is honestly probably way above your skill level to repair. If you want to learn keep working at it, if you are simply trying to get a decklid painted then I would begin the search for a replacement.
The problem is I can't get to the back of the metal to do what you said because there is an inner panel there. If you would have read thru the thread you'd realize that. Also this panel was probably beyond hope to begin with because of what previous people have done to it. I should have just replaced it even if it meant paying a small fortune to get one from Arizona or some other dry state.
I'm signing off on this thread, and probably on this forum. My understanding this forum is to discuss issues that come up while doing paint and body work not for people that think they know it all to run other people down so that they can somehow feel superior to them. This also leaves me with a such bad taste in my mouth that I'm thinking about quitting using SPI products.