From: Simon Peter Gatrall <sg1q+%andrew.cmu.edu@ssyx.ucsc.edu> Subject: Re: Flame traps Date: 11 Apr 90 19:13:12 GMT >Such traps are used in gas systems, and a gas supply house should have them. A >possible (untested) improvization would be to insert a loosely packed plug of >steel wool into the sprayer lance, as near as possible to the tip (to reduce >the untrapped volume). Such a plug should not reduce the pressure too much. I would NOT try steel wool. It burns very easily in the presence of enough heat. Find some sort of metal screen, possibly from a garden hose. Test it first with a lighter, or some flame. If it can't stand up to a flame for a long time, I wouldn't use it. I don't know what the best material would be, but I do know that steel wool would probably be a big mistake. If you investigate these kinds of toys scientifically, testing small parts of the system at a time, you'll live longer. -Simon Gatrall sg1q+@andrew.cmu.edu