I asked a question about pontoon splash guards a few weeks back with no replies. Oh well, guess the thickness of them doesn't need to be any thicker than the pontoon itself.

I've never tig welded on pontoons (thats under a pontoon boat) Just how thick are they usually? Would they go an 8th? Probably more like a 16th.

Is it ok to use air to purge them free of any flammable gas that may be inside?

It's not an old boat and the toons look pretty good, just the splash guards have broken off at the welds.

Any advise?