Office of Steam Forum for Model & Toy Steam Gas & Hot Air Engines

At the paint store I found naphtha reasonably priced as “Painter’s Naphtha".  I assume it's the same as Zippo or Coleman's, but wonder if there might be some refining differences which would make the painter’s product a bad choice for the ET1 engine?

Also, the automotive fuel system additive Sea Foam is apparently a formulation of naphtha and pale oil.  Would it have any advantages as top-end lube over WD40, 2-stroke oil, or Marvel in these little engines?