I have read here and there people asking if using a Sharpie for pre shading was a good idea. The universal consensus is that it's a very bad idea. Well this morning I had an eureka moment. Why not use an acrylic paint marker. Off to the hobby store I went. Well let me tell you, it works like a charm.

This is what I bought.

These are wing pylons for a F-15 And the drop tank is the end result.

Can't even believe I didn't think of this before.