I need to clean a fair number of frames for myself and for work purposes. How do commercial types do it ?

I had figured getting a metal drum and using a gas boiler (5kw or something). I recall someone mentioning using soda ?

Any pointers most appreciated. I've tried steam cleaning and although its fairly good, I need to get a gas boiler for things other than bee frames so figured 2 birds 1 stone.

Thanks !