Paint types
—Introduction for all kinds of paint

http://www.scalemodelguide.com/painting-weathering/painting-guide/paint-types/

All about Paint Brushes
—Information of paintbrushes’ size, shape, materials, where to buy, etc

http://www.scalemodelguide.com/painting-weathering/painting-guide/all-about-paint-brushes/

How to Paint a Gundam with Brushes
—Basic skills and tips for hand-painting models.

http://www.perfectdesignsense.com/martinwandering/guides/brushpainting/brushpainting.html

Gunpla Tutorial : Dry Brushing
—Using Gundam model as and example
—Gave the model more detailed look.

http://www.youtube.com/watch?v=PxkV70Jvakw

Airbrush Basics
—A short introduction on choosing the right brush and using them.
—The site also offered some painting skills for you to create some special effects for your models(mostly miniatures).

http://blog.brushthralls.com/?page_id=3024

Airbrushing for the Beginner #1~4
—A complete video tutorial for those who never use airbrush before!

http://www.youtube.com/playlist?list=PLE071F9B3FBCC532C

Aging & Weathering Models
– Using model cars as example, making them more realistic

http://www.youtube.com/watch?v=qSmjvBoYIMA
http://www.youtube.com/watch?v=cRLcPnjIa70
http://www.youtube.com/watch?v=11773h0nQTw

Gundam MG Sinanju Airbrush Tutorials
—A list of videos of airbrushing Gundam models.

http://www.youtube.com/playlist?list=PLX9uHHUiMf9-XbTL7E2zawcb2ES6gZAWR

Airbrush Tips & Tricks Series
—These videos are from http://www.gundammodelkits.co.uk
—The site itself has some decent gunpla/resin kit review

http://www.youtube.com/playlist?list=PLX9uHHUiMf98K1d7DyKBfYUarzmyDdVCW

Shading Techniques
—Demo using wings, hair and denim of some garage kits

http://leonasworkshop.com/how-to/shading-techniques/