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

If you want clear, you might want to try nitrocellulose lacquer. I imagine it will hold up to heat nicely at least for a while.

Over the years it will yellow and darken some.

Marklin used it on their boilers and boiler housings.

I just wanted to try to beat the oxidation so the boiler would remain shiny and a rattle can sounded simple more so than spraying lacquer which I haven't done for decades.