From their website:
Four tutorials have been posted to the new “Tips & Tutorials” page at www.secretweaponminiatures.com. This includes revised versions of previous tutorials all on one easy to find location.
If you have a weathering, basing or scenic technique you’d like to see a tutorial for – or just a question – feel free to email misterjustin at secret weapon miniatures dot com any time. I love getting questions and I’m happy to help.