Katie
I have found that I probably get more questions about Starfire than any other costume in my gallery, so from now on, I'm going to redirect all questions to this photo description (rather than typing them out over and over again). :D
The wig - Alicia XXL in Henna Red. Ordered from Cosworx.
The "armor" - Silver 2-way stretch vinyl over craft foam. Not recommended, but it was what I had leftover from Ulala. I'd say go with metallic spandex instead.
The skin - Mehron Liquid Make-up for Face, Body, and Hair in orange - http://www.mehron.com/Liquid_Makeup_p/111.htm - I added it to a body lotion (I believe it was a 1:1 ratio) and then slathered it all over my skin like bright orange sunscreen! This makes for a great TINT, but will not give you opaque color! I definitely would suggest buying some and doing several application tests- see what works best for you!
The boots - I bought a pair of brown (boys) lace-up shoes (they had the right look for the sole), cut off the tongue and lacing, masked off the leather, spray-painted the soles silver (should have primed them first, though, because they're still a little tacky to this day), then made a bootcover out of spandex and glued the edges to the sides of the boot with Aleene's SUPER FABRIC Textile Adhesive (GREAT stuff!). DO NOT USE HOT GLUE. It doesn't hold. I don't have the time or energy to make a bootcover tutorial right now, so please do your best to find one on the internet (there are several great ones out there).
Hopefully that oughta do it! Photo taken by Silas in 2007! (Before I fixed up the costume for ACE 2008.)