'72 Scamp - How to remove old vinyl top and prep for a new one?

The vinyl top on my '72 Scamp is in terrible condition and needs to be completely replaced. My goal is to remove all the old vinyl and prep the top as best I can so when I find a new shop the install will be as cheap as possible. I have a few questions:

First - How do I remove all the chrome trim without damaging it? Once I pull off the old vinyl do I use a chemical to remove the old glue/residual or just sand it down?
Second - The bottom C pillars are pretty rusted. Can I just sand away and fill it with bondo? A neighbor came over the other day and said I should fill it with lead (which I have absolutely no experience with)
Third - Right now I just want to get all the vinyl off and spray some primer down to prevent any further rust. I also just want to drive it around a bit this summer while I find a good shop to put a new top on it.

Any thoughts or opinions? Thanks

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