Sent in by Rod:

Another trick I discovered, is to gently dribble some bleach over a cliff face using an eye dropper. You need to be careful not to get bleach on your clothes as it will take the color out, but when dribbled down a cliff face it will settle in the cracks and give a good weathered look.

I also use dry brushing on cliff faces and rocks. For those that don’t know; dry brushing is the technique of dipping a stiff paint brush into paint before brushing off most of it from the bristles. You lightly drag your brush over raised rock surfaces to deposit a very small amount of paint to highlight the raised-up sections only. I dry brush a little white paint to highlight the rock edges. I dry brush to slowly add a little hint of color to the rock work.

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