Well, my trooping blaster is a Kenner, that I used the exact same method on.
I fit the blaster with a few new parts (from a source who shall remain nameless) consisting of a folding stock, front nozzle and a mag/clip addition. Then did a little sanding and such to remove lettering.
I hit it with Krylon grey primer (2 coats), then with 2 coats of aluminium-colored paint, then after drying 2 coats of semi-flat black. (I prefer semi-flat, as the flat paint is TOO flat for a supposedly metal gun... at least in my opinion.) Also did a little light sanding between coats.
All paints were standard Krylon spray paints. (No "Fusion" or anything like that.)
Then, gently sand with a fine-grit paper at obvious wear-points to expose the aluminium color. This method works well, and has the advantage of self-weathering over time as it's used and put in and out of it's holster.
A side view.
Another side-view.
Looking closer at the new stock and mag/clip assembly.
Closer shot of the barrel and stock.
Closeup of the new mag/clip assembly.
Front view
(NOTE: These pics were taken right after I finished the blaster. It's been about a year now, and it looks better and more weathered after being used.)
Eventually, I plan to replace the ugly scope with something a little nicer, but this blaster is specifically for trooping, so I'm not shooting for 100% accuracy here. (I have a nice resin E11 for that.)
I MIGHT eventually sand/fill the seams, if and when I decide to open the thing up to add some better electronics.