Thanks

Great work on those markers me Capt! So what colors did you use for them, as the groundwork looks quite convincing.
Rob, it's Vallejo Iraqi Sand, with an off-white drybrush, especially on the rocks. And a very thinned wash of Army Painter soft tone ink, allowed to pool around the base of the rocks.
How do you do the chipped paint effect on your vehicles? I'm always afraid of overdoing it, so I'm curious about your technique 
I've only just worked out how to do it myself!
Having tried to paint on 'chipping' a couple of times, I have finally worked out that the only way to get convincing chipping is to actually chip!
Essentially - paint your vehicle / helmets / whatever with a dark coloured enamel undercoat - I've used dark grey Humbrol on the last two or three vehicles.
Then paint your acrylic colours on top.
Then you apply a patent 'chipping solution' along the most exposed edges or areas most subject to wear. I use a product by AK Interactive called 'Worn Effects'. Basically it's a softener. Once you've sloshed a bit of this stuff along where you want your chipping, leave it a minute to soften the paint, and then gently scrape away with an old brush or some other implement, and hey presto - the acrylic scratches away, leaving the chips of dark enamel undercoat exposed.
The reason it looks convincing, is because it is actual chipping!
You do get left with a few soggy flakes of acrylic - you just have to immediately wash these off with a liberal dousing of white spirit.
It's actually really easy once you get the hang of it
