I don't know. I built models too and though I can to a great job on a Spitfire, I just don't think that such a paint job would look nice on a firearm. If you want it camo'd purely for the looks of it, I know that the local gunshop here will apply any of the popular patterns (Mossy Oak, Realtree, Advantage, etc) to a gun for $180. They're using the same stuff they use at the factory to camo guns. That'd probably end up looking a lot better.
Myself though, I'm a blue/wood guy. Only gun I own that isn't that way is a Remington 870 Express that I use for duck hunting (it's got a Wetlands pattern stock set and is coated in teflon or something).