How long can you keep solvent based basecoat paint? I am going to be spraying the engine bay, underside of bonnet and front panel of my car before reinstalling the engine, and then putting the car into storage untill i get time to complete it, maybe 1-2 years (i'm restoring it to show standard so thers no hurry). So the basecoat i buy could be 2 years old when i use it, as i want to buy all the paint i need in one go (5 Liters) to insure colour consistency. Cheers