Head to your local
paint store. There are lots of heat resistant products out there. Just re-paint the whole thing if the stove is still working. Ours was a crackled metal finish. The
boler had stood in a field for years and food drippings left on the stove. I finally had to use a wood chisel to get the goop off after CLR and everything including muratic acid failed me. Needless to say the finish was a mess so I just used an aluminum coloured heat resistant
paint. Since I made a chopping board cover that lives there most of the time, the whole thing looks fine. Not pristine but since our
boler is a camper on the go, rather than for show, it's fine.