Question: Where can I find some small fishing weights in the KL area? I've got a model kit (1:72 Revell P-38 L/M) with some really big balance problems, and the ball bearings I have won't fit inside, and I have some really large doubts about whether the stainless steel nuts I have will do the trick.

I would say good ventilation is more important. But if you're asking, get the sort that can keep vapors out, if you can find them...