Sorry guys, I tried to post earlier but I guess I did not push the correct buttons.
So, I suppose I should have posted some progress pics. The steps were:
1. Sponge chipping with rust colored acrylics
2. Outline pooled rust with 4-5 rust colored acrylics
3. Treat the inside of each pooled area with various rust colored washes & pigments
4. Trace over the edges of each puddle with brighter rust colored acrylics
5. Enhance previous rust colored washes with various tones
6. Add "Wet Effects" & "Engine Grime" & "Fresh Engine Oil" to the entire area in random spots.
The key realy is to build layer upon layer and change color often. I am glad you guys enjoy these little skips.
Thanks for the kinds words as well. As soon as this one is finished, I will post up some pics.