Glue: My personal recommendation would be Testor's Liquid Plastic Cement. It bonds, by "melting" the plastic, and as the liquid evaporates, the plastic solidifies. For a styrene to styrene joint, there's little better. Care, however, in handling the model when using liquid cements; capilary action will cause the cement to creep under your fingers, and leave large fingerprints on the surface! I still prefer to use straight MEK (Methyl Ethyl Ketone) as a plastic cement, it evaporates faster, but contact with the skin can cause nerve damage. It is also NOT a good inhalant, so use overkill ventillation. Alphcyanoacrylates ( ACC )(CA) have very good tensile strength, but next to no sheer strength. I use CA only to hold things like eyebolts in place. There are some who swear by CA as a good glue for plastic kit assembly, I have never shared that point of view. Paint: If it has been years since you used any model paints, you will have to redevelope your painting techniques. This would be a good time to go to Acryllics. It would also be a good time to consider airbrushing. I am not an artist, and I do all my weathering with dry brush techniques, so a single stage airbrush serves me very well. If you want to weather with an airbrush, you would be better off with a two stage brush, which gives you independant control of air, and paint, simultaniously. I moved from enamels to solvent based laquers ( the old Floquil line), and have stayed with the Floquil paints since. I know how to use the product, and can make it do what I want. I have a comfort level with the product. Your Paasche air brush is an excellent brush. Again, where you are starting, it is a good time to combine techniques. Learn to use your brush with Acryllic paints. They are environmentally friendly, and brush cleanup is easier( there are others who can help you with acryllics, a visit to your local hobby shop could also be useful). Finally, good luck with that constitution kit, that's quite a project! Go slow, and patiently, the finished model will be worth the time and effort.
Pete