If you are concerned about stripping the interior wall/ceiling finish and the Airstream involved is 1965
or before, the interior wall finish likely did not start out as bonded vinyl. The original interior wall finish would have been Zolatone - - a very tough and durable paint product - - I am not absolutely certain of the exact cut off date for Zolatone (for interior wall/ceiling finishes), but I am fairly certain that it was still the primary interior finishing product through 1965
. Many who have tried stripping the Zolatone have reported that it takes the strongest "aircraft" strippers to loosen its tenacious grip.
When Fowler Interiors refinished the walls/ceiling in my '64 Overlander, their recommendation was to scuff the surface and smooth rough areas with sandpaper. This process was followed with a three color sponge painting technique that looks similar to, but not identical to the original Zolatone. The sanding job was made a bit more difficult as some of the last coat of atrocious tan paint was peeling - - there were three coats of varying shades of celery green and landlord's beige paint on the interior of my coach. I am absolutely thrilled with the results which didn't risk damaging the very nice original woodwork with paint strippers.
I would also caution about using heat as a stripping agent. My concern (in addition to the wiring mentioned by Bobby W) would be that the heat may degrade or ruin the water proofing that was applied at the factory to seal penetrations in the exterior skin as well as along the ribs. Another issue, if the coach has plasticoat that is still in good condition the heat could also potentially damage that as well.