Preshading over dark colours...

Of course you can as pre-shading is used to "highlight" the crevicess/recesses and/or the darkest areas on your model. I'll go for a black pre-shading on the selected areas. Remember that the camo colour shoud be quite thinned otherwise is quite likely to loose all of the pre-shading effect...
Ciao

thanks :)

Well, if you can find the Tamiya Model Magazine (published by ADH Publishing in England) in your hobby shop or book store, try to look it up the April/May 1999 issue. There was an article about preshading a Centaur. I think you can still apply the technique on your Cromwell. Basically, the author preshaded the entire tank black, then he airbrushed a layer of his custom mixed shades of olive drab(I suspected it was a mixture of Tamiya XF51 Khaki Drab, XF5 Flat Green, and XF52 Flate Earth), he then airbrushed a lighter colour of his olive drab(will more XF52 Flat Earth) to highlight.

Eggluver,

Try this. The concept would be the same, just use your tones not the white


http://www.tamiyausa.com/product/plastic/tips/white_wash.html

excellent, thanks...

i was going through some of my FSM magazines and came across the one with the winter wash how to, so i have decided to try a winter camoflagued Cromwell mk 4 ... that link u gave me will help me lots,

thanks for the help guys