Use an un-thinned paint appropriate out in the can for this stage. The thicker paints will not be as transparent and can look bolder. I use a little brush to use a liberal coat of burnish on two or three depressions at a time. Then using a cotton rag wrapped http://remingtondgwyt.alltdesign.com/a-simple-key-for-paint-for-formica-cabinets-unveiled-17829363