Since my last post, I've confirmed that Kleen Strip Aircraft Stripper (found at Auto Zone, WalMart, etc) will remove the paint & Zolotone if milder chemicals won't. I haven't done it personally, but I've recently seen a trailer that had the interior Zolotone stripped....and it looked great! Be sure to follow all label instructions as this is nasty stuff...especially if used in areas with restricted airflow like the interior of a trailer!
There are several threads discussing the pros & cons of stripping clearcoat & paint...try a search using "stripping" & "Aircraft Stripper" as your keywords...
Good luck!
Shari