--- In mini-painter@y..., "Judith Northwood" <judith@n...> wrote:

OK, so I'm jumping back in with an old thread as I catch up on what's
happening on-line, but I do have a suggestion for creating the look of
black oil if anyone is still interested:

Start with black paint and make sure you have good, thorough, smooth
coverage, then add thin layers of semi-gloss or gloss medium (thinned
with water and/or airbrush medium/flow-aid) and a bit of Golden or
Liquitex interference paint or a bit of the Pearl-Ex interference
powders. I specify the interference colors as they do not have pigment
other than the mica particles and are the most likely of any "special
effects" paint product to replicate the appearance of the rainbow that
swirls across oil. Either mix several interference colors or alternate
colors on the layers, but be sure that there is a *lot* more medium than
pigment. The color should be only a hint and the transparency would be
very important. When done, be sure to use a semi-gloss or gloss varnish
on the "oily" area. To strengthen the illusion, use a swirling brush
movement when applying the interference glaze, and use *only* medium on
shadowed areas, not the interference glaze.

I messed around with the idea a little bit, and I think it should
replicate the look of an oil slick with reasonable success.

As with any experimental color concept, though, try it out first on some
watercolor paper so any adjustments can be made before putting brush to
mini.

:^)

Judith