Hey guys thanks for the feedback...
As far as painting with oil goes it is rather easy. First off some acrylic paint is used, but that is more out of speed, and need, in the case of the metallics. Basically what I do is the following;
Step 1- Prime. For these IF marines I went with white because I really wanted them to pop.
Step 2- Basecoat. To help speed up the painting process I base coat all my marines in Vallejo Golden Yellow. However, like most yellow based paint it is fairly thin and requires multiple coats for a decent coverage. I have been thinking about getting a couple cans of Army Painter Primer, just to speed up the process.
Step 3- Clear Coat and Decals. At this point I put some future over the whole model, this provides a nice surface for the decals to attached to, and provides a nice mixing surface for the oil paint. I do about a 1:3 ratio of Future and water, and it is airbrushed on very lightly, in fact it is hardly noticeable, however I do place a thicker layer on the shoulders where the decals will go. After the decals are dry the model gets another coat of Future, though only on the decals, to help level them out.
Step 4- First Oil Layer. At this point the process really becomes glorified dry brushing. I have a small porcelain dish that I put a small amount of Cadmium Yellow and Oder-less Mineral Spirits in. It is a very small amount of both as a little goes a long way. When oil paint comes out of the tube it is quite thick, I add just enough Spirits to take it from a toothpaste consistency to a thick gravy consistency. Then I take a flat brush, load it up, wipe off the excess and proceed to work the yellow onto the model, trying to be neat around the the decals, if you get any on the decal, it wipes right off, or you can re-paint the decal later. Usually I paint 5 or so of these guys at a time, so I work in a round robing fashion. Coat one, move onto the next, and so on. By the time I come back to the first one, it is dry enough(thanks to the Spirits) that I can add a 2nd coat if needed(which is rarely) or tidy up some spots I may have missed.
Step 5- Clear Coat. After I have all of the yellow base finished, I hit everything with a quick coat of Testor's Dull Coat. This is a lacquer based clear coat and dries with in 10 minutes, including the oil beneath. It is important though that all of these layers you are adding are kept thin, you do not want to obscure the detail, just get adequate coverage and stop.
Step 6- Shadows. After the lacquer has dried, I mix up another small batch of Burnt Umber, in the same manner as the Cadmium Yellow. Then working in a shadow-highlight-shadow pattern I start to build the shadows up. That is where the darker color comes from. I keep the yellow handy so that if I push the shadow to far up the model, I can come back with the yellow and clean things up.
Step 7- Another thin coat of Testor's Dull Coat.
Step 8- Details and Highlights. Using acrylic paints at this point, which is perfectly fine because of the lacquer coat, I start to pick out details and highlights. I keep it very simple, 2 shades of blue for the lenses, black for the shoulder trim, black gray for the bolter, chainmail for the metal parts. Red for the aquillia if any. Then the bolter and chainmail bits all get a black wash, and I use Devlan Mud in the deepest parts of the model to deepen the shadows a bit more. Finally my highlight color is Flat Yellow. After all that I do the base according to my theme.
Step 9- Final Clear Coat. Done
It sounds rather involved, but it goes quite fast. I think these 4 guys took me maybe 3 hours total. The dull coat really speeds up the process and by keeping the details simple in the end, you can have a very nice looking product.
Ashton