Originally Posted by DRITCH
Buy some colored tissue paper.
Coat the tissue with Water Based Polyurethane using a small sponge.
I use this method - and add in some of those paints from Michaels (those $1 2 oz cheapo acrylic enamels) to the WBPU. Either that, or I've been known to use the glucohol method that I read about here, and again use the cheapo paints for colour. You won't beat the price (if you're looking for cheap) using either of these methods. You'd be surprised at how little weight is added vs. the strength added. Get the tissue paper from a Dollar Store.