Here is a how to on creating rusting effects.  LINK

A good gun metal pigment application tutorial  LINK

A How to on building a diorama  LINK

Here is a guide to WWII Luftwaffe camo colors and patterns  LINK

For you Scifi modelers, detailed close-ups of Star Wars spaceships  LINK

For you ship modelers, here is a Vallejo equivalent paint chart for naval
colors.

Looking for a way to make tarps?  Try alcohol/glasses wipes!  Have you ever
used one of those alcohol wipes in the little packet?  How about the eye
glasses cleaner?  If you have, why not recycle it?  Lay it flat and let it dry out
and you will have a great, low cost/no cost scale tarp.