Thank you for your messages :)
After the original post, i found out this manual that is very complete and detailed about the parts and service of the 95 Rockshox Mag21. I've also found out that a original service kit is almost impossible to find, however enduro, sells seals for it :)...
Thank you very much. I'll try to do that and them i'll post the results here.
I'm designing new stickers for every single part that need new graphics: Frame, Fork, Wheels, Bar and Crankset.
I would say the part of problem solving is really the part that i love about mechanics...