Removing SS Bolts in Mast

[mikefossl]

Next year I'm planning on changing the standing rigging and doing a complete overhaul of the mast. I'm concerned about all the frozen SS fasteners in the spars and aluminum fittings. In my experience, any fastener bolted into aluminum and exposed to the elements has either broken off if small enough or not budged. I guess the rig was put together before tef-gel became a standard.

I came across a "trick" where jumper cables and a hi-amp 12V source are used to free stubborn fasteners. The current flows easily in the aluminum but the extra resistance in the stainless causes the fastener alone to heat up. Has anyone tried this?