I need to quickly, precisely, briefly heat small aluminum parts to temperatures in the 300 °C to 400 °C range. Maybe a solder pot would work? I’d need a solder (or other alloy) that did NOT wet or stick to aluminum, and did not leave any deposits on it either. I think I also need the solder to not form a scummy film on the surface that would cling to the parts, interfere with heating them, and contaminate them.
The parts are a bit smaller than pushpins. I want to heat them for, say, a second to a minute. I plan to leave a precise thermometer in the pot, too. Perhaps I need to use stainless tweezers or tongs to hold the parts and maybe swirl them around, so perhaps I need the solder not to wet stainless as well, but maybe this isn’t needed.