I found this solution for "dry brushing" in some photoshop forum. Is there a way to do something similar in Sketchbook? Below is a quote, and the original link. Greatly appreciate any help. 🙂
QUOTE: "With oils and acrylics, using a dry brush is a very common technique. To simulate a dry brush in Photoshop, pick a default chalk brush (or any brush except Round) by clicking the Brush Preset Picker in the Options Bar, clicking the right-facing arrow, and choosing something like Natural Brushes 2 from the list. (When the warning dialog pops up, click Append to add these brushes to your current set, or OK to replace them.) Next, open the Brushes panel (Window>Brushes), uncheck everything except Smoothing and then lower the Flow setting in the Options Bar."
LINK: http://planetphotoshop.com/find-your-dry-brushes.html
Thank you all