Whenever I have to paint anything silver, I use Krylon Fusion "Nickle Shimmer". It's pretty good stuff. It's just a suggestion/idea for you.
My EE-3 is coming along as well. Last night I got the Barrel Mounts from Sidewinder as well as a Heiland Flash Tube Gun. Now, I just need to wait for the parts from Omega_Man as well as find someone that sells the V-8 Rods for main body. After that, I can paint, and assemble the blaster!
Already have the leather sling thanks to Fett_Officer.
I'll try to get pictures of the blaster ASAP!