1.) Brass? mmmmmmm that depense on which parts. 2.) Seals, I do not think you need to replaice all seals. I would reccomend so, to see if they have cracks, and or are very dry, then just replaice those. 3.)Wax, I have tryed Zymoil, I love it so mutch you can have my can. :) What I ended up using is Meguiars, high qualaty antistatic wax and polish. But as I say to each his or her own. 4.) Color, well I personally beleive in an original look not a fake after color, as well if you have a different color painted you would need to do it in and out. Again thats all personal prefferences.