Recently my Mac mini got very, very ill, and i was computer-less at home for 10 days.
I had never tried using watercolors much before, but it is an excellent way to do small details that can't be done w/ a Q-tip. And i had never tried doing much w/ pearl/luster surface prints, they didn't seem to 'take' oil colors very well, at least not Marshall oil colors. Well, my Marshall set dried up a long time a go, and I don't like the ones they sell now, at least that's what I see at Dick Blick.com - they seem to have dropped alot of the classic colors - I am used to the traditional stuff - sienna, raw sienna, umber, paynes grey, cerulean - they have added some other colors I just don't get, or want.
So I bought a six tube set of very basic artist's oils.
I pushed myself much more w/ the watercolors first. Again, I have a basic set, 8 little bottles in all. One of the keys to adding watercolor is to wet the area you want to color first, w/ plain water. If you try and add color to a dry print, it will sink in, leave brush marks, and there's no "Command+undo" for that one. You need to soak it a bit first, just water w/ a Q-tip
Here's how hard i pushed the watercolor, below are 2 prints, the watercolors only at left, and at right, the final w/ oil colors:
When i dove into 'part 2' - the oil coloring - i discovered that the Ilford 'pearl' managed to take it in better than i had thought it would. First of course, i hit the print with linseed oil, let it sink in for a few minutes, then wiped the excess off w/ kleenex. The oils i had seemed to sink in just fine.
You've pretty much got to it all in one pass, one session - I have tried returning a few days later to tweak a few things, and the fresh oil color dissolves what's already there, and you just a very hard to fix mess.
Here's some good links, the last two are at my blog: