There's no reason it couldn't
be stripped...just like clearcoat. The only concerns I would have are:
- Was the surface sanded to make the paint stick better?
- Is there body damage which may have been repaired w/Bondo prior to painting?
- Are there irreparable scratches which would show once the paint is removed?
With clearcoat, you could see these defects - with an opaque paint you may not.
Chances are you could "fix" whatever you may find beneath the paint...but it's a big unknown until you are committed. Could be as simple as a little more elbow grease to polish or a bigger deal like replacing panels.
If your heart is set on a polished
trailer, I would probably pass on this one unless it is free or priced really, really
good. There are lots of early 70's 26-30 footers out there that would be better candidates or at least show "what's involved" up front. Polishing is a lot of work to begin with...no need to compound the effort with "unknowns".
Good luck with whatever you decide to do ~