I'm looking to build a DIY heater for my luber, though still thinking of just using a cheap blow dryer. Can't find any aluminum plate scrap locally for the base, then it occurs to me I have an oval fish fryer in thick cast iron I'm willing to sacrifice. The only issue I see is that it's cast iron and I don't want its rusting to screw up the base of the LAM. Thoughts? Thin aluminum "skin" mounted on top of the cast iron, below the LAM base?