From all that I have seen, I believe your information about SEA armor is correct, at least as far as continental SEA goes.  Metal armor was not used.  In Burma and Thailand the common soldier (who was a levy soldier) went essentially unarmored, and the more affluent wore a "war coat," which as near as I can tell was of heavy or padded silk, and a leather "war hat" which looked a lot like something Jimmy Buffet might be wearing down in Margaritaville.  I have a scan of an old catalogue that shows a war coat and war hat, and if no one else posts it in the meantime I will put it up this evening from home. 
 
Two-sword techniques were apparently used regularly in warfare in both Burma and Thailand, as well as sword-and-shield, sword-and-buckler, and double-handed techniques.  Each one used a slightly different type of sword.  Andrew has done the real research in this area, so hopefully he can add more. 
 
I have read that the standard court dress in Thailand was a sword (daab) and keris, which makes me wonder if there is or was a sword-and-keris technique.  That would be an interesting parallel to the European rapier and main gauche, which was for dueling with an un-armored opponent.
		 
		
		
		
		
		
		
		
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