Yeah, probably better off doing a re-paint. But thanks for doing the research!
That should be the last option IMO - if the original paint is OK and just yellow then suppose it's up to the owner if they can live with that.
Repainting a cab is a MASSIVE job - I'm working on my third one now. It's a fun job, actually I enjoy it more than any part of the restoration. Couln't even ballpark the amount of hours it takes....
40? 50?
Results with patience is well worth the effort though