Here's my first attempt at flames.  It's a HPI Pantera.  *note unfinished, have mirrors and stickers for the front indicators to go on.  I used a transparent blue in a light coat and while it was still wet sprinkled some purple glitter on, then blue again, then some more glitter.  Did this 3 or 4 times.  Sprayed a little bit of black to make them stand out then did the rest of the body with more transparent blue and backed the lot with black.  The 3rd photo shows the colours better.
4th photo is a dodgy one but shows the bigger foams I use on my Ofna OB4.  I think I'll go some HPI 'Vintage' wheels though.

 

 
 

 
 
 
 The spots and dust are from being near the budgie cage...  Didn't notice until now.