First invest in some blue soldering glasses then make sure you
have a hoy enough torch, I am not where you are so it's hard to
direct you to suppliers but the yellow pages is a good place to
start. Platinum is a very heat intensive metal to work but it has
wonderful thermal properties which allow you to fuse it with out
the structure falling apart
Ringman, Michael, and others...
DON'T use those cobalt blue glasses with platinum. they've been
around for years, yes. but a standard green welders lens is far
better protection. the problem is that the blue, though dark enough
to make it possible to see what you're doing, do not provide good
protection from either infrared, or ultraviolet, both of which can be
present when working with platinum. They look nice, but the're not
safe for any but very occasional use with platinum.