Don't like the idea of the freight component, would be thousands. I two packed our bath, it is as good as new now.

Here's another one, they've been around for years in Australia .... http://www.refinishing.com.au/index.htm

 

My builder Son in Perth quite often does; a two pack coat on bathtubs that are quite good but clients want to change from dated green or yellow tubs when they are remodelling. It costs about the same as a new bath but saves on demolition and re-plumbing. It is a lengthy process requiring area to completely dust free for several hours under heated fan. I have watched him do a couple of them, but I don't have the patience for all the finicky bits. Personally I'd rip out the old bath and replace it.