On my last thrift shop expedition I found this Pentax K1000. It is probably from about 1976.It was clean, the shutter worked fine but the meter was dead.When I got home and opened it up I found that a leaky battery had dissolved the lead from the battery box.The battery box contact is stainless steel and the wire had been crimped in place. It wasn't possible to open the crimp, it's too small to work with.There is a product made for repairing the defroster grids on car windows, it's a conductive paint product. I used it to repair the wire...