I don't know why, but the AMTech P-40E comes with two fuselages, I can't see any differences between them at all. I haven't been able to find an answer to this mind boggling question but I have two of the kits and both have the duel fuselage issue. The P-40F/L I have of theirs does not.
As to your question Geo, I am using the Testors acrylic green chromate. I don't like it as it is too light but it is what I have and can't get anything else for now.