I am soldering a series of spring like high carbon steel wires to flat copper plates, for example like on a set of snares on the bottom of a musical snare drum. I am using gas flames and soldering paste/flux material and this requires a large puddle of solder to fully encompass the springs. One issue is that since I need so much solder a lot of it wicks around onto the back of the copper plates and requires a good amount of cleaning. Does anyone know if there is anything I can apply to the back of the copper plates that would prevent the solder from sticking? I see some solder masks on-line but they seem to be for electrical soldering and I suspect they could not handle direct flame but maybe? Or some kind of paste I can paint on that cleans of more easily? Any ideas are greatly appreciated.

Hello all, I am looking for a cost efficient way to build a frame to mount a 42x36 inch ~150lb Hoffman electrical enclosure to. This frame would have to be portable, likely using wheel castors. Originally I had thought of using unistrut however I am concerned with the joint where the vertical beams (to which the enclosure would be bolted) meet the horizontal beams (with the castors). Does anybody know of perhaps a better material to use for this or wether unistrut would be able to take the weight? I would prefer not to use thick steel tubes since I don’t have the proper tools to cut them. Thanks!