The steps that have proven effective to me are as follows:
-paint the desired scheme
- seal it with future
- using artist oils and mineral spirits, mix a thin concoction of the desired color
- load the small tipped artist brush by dipping into the mixture
- touch the panel lines and allow capillary action to draw the thin mix into the crevices and raised detail
- alow to dry over night
- with a q-tip dipped in mineral spirits, gently swab away excess wash to desired effect
- hit the raised detail with some drybrushing
Good luck and be patient friend