Hi there Safari,
We have a '61 Safari and tub problems (cracks, chunks out, stains, etc.) are pretty common. We looked into geting our tub (in the earlier models, it was separate from the sink) resurfaced, but were repelled by two estimates in the $500 range. So, I started asking around and found out from many mentors that fiberglass is really pretty easy to work with. It's a composite made of epoxy and fiber material--so you can pretty much form any shape--and repair it at will. I started work on my tub last weekend--I'm keeping a diary here: http://www.airforums.com/forum...153#post109153
So far, I've only done the prep work and epoxying. It's very easy, just a little slow, since I have to wait for the stuff to cure!
Good luck, let us know what you do!