Ok My custom Ecto-1 Which was viewed in the Hotwheels thread originally, I've decided to share what I did with mine. First off let me introduce myself.
I'm Ecto-1's Driver- Logan. I'm a model builder by professional trade standards. It is a hobby as well as a Job to me. I also enjoy this kind of stuff. Ok So here is the breakdown for the paint colors and aps used.

Citidel Paint system by Games Workshop. ( RPG Acrylic Paints, Found at most Comic stores.)
Model Master paints Enamal(Chrome Found at a hobby shop and made by Testors.)
Tamiya paints( Clear Red and Clear Blue also at hobby shop)

Ok GW paints used are as follows.
Ultramarine Blue( Hoses on the driver side.)
Chaos Black ( Roof Rack frames and Ladder and details.)
Fortress Gray ( Top of pilon box, and Photon Cannon base.)
Golden Yellow ( Tanks on both sides.)
Skull White ( Inside detailings on the cargo box and weather dome/touch ups)
Blood Red- (Tail fins / Touch ups.)
Firey Orange ( Photon Cannon.)
Chrome( Back door handle ,Center of light bars, gas cap , trim, Lights, Siren and UV lamp housing. Also will be used for other chrome accents when I get around to doing them)
Clear Red( brake lights and UV lense.)
Clear Blue( lights lenses.)
Brushes used. MIchaels Horse hair 0/10, 0/00

Great work over there… I´m not that brave to painting it… don´t even getting it out of the box.

Ghostbusters213;158917
Great work over there… I´m not that brave to painting it… don´t even getting it out of the box.

Yeah, but I'm not done tinkering around with ‘er jus yet. I’m currently working on a couple of Ectos, both 1:24th Polar Lights. One is going to be box stock, with graphics and wiring for the roof rack. The second will be built out once again with Proton Packs and a Rack for the back, in addition to Magazines on the front seat, plus some added effects, like an E1A AMT glass set up for it. It's going to be slightly different, and more movie correct. If I cannot get the glass to sit how I want, I may just leave the black out windows, and install lights for the C3s.

KansasCityGB;158922

Lookin' good there Kansas! I was going to simply cut the centers out of my ladder rack, but decided against it due to the smallness. But yours is lookin' pretty nice. I am curious however… Why did you use green on the long storage container on the passenger side? Went with the box art?(*ray)

I was wondering if someone was going to do this or even be able to. Looks great.

I went with green since that what the ecto currently has. I know it was yellow up until they restored the original ecto. I finally got some blue paint and painted the four lights and hose blue.

jettajeffro;158926
I was wondering if someone was going to do this or even be able to. Looks great.

Yep! seems I did the movie version, while Kansas tried his hand at the restored version!

KansasCityGB;158928
I went with green since that what the ecto currently has. I know it was yellow up until they restored the original ecto. I finally got some blue paint and painted the four lights and hose blue.

Nice, I'd like to see how it turns out for you! I did more tight ups and paint aps on mine. Gave it chrome trim on the top of the fins, did some other pieces too.. Here's what direction it went.

I know I'm late to the party, but I just did my custom last night. (Finally had an extra Ecto to work on). I don't have the steady hand that y'all have, but it's amazing what a difference a little paint makes. Also, please excuse the fuzzy pics - taken from a 2 generation old iphone.