Are you modelling after the IA masterclass book?
YES. That's a GREAT BOOK !!!!
Automatically Appended Next Post: Tonight i can do more than the other days.....
Here an example of "hairspray" technique using the special product coming form A.K Interactive:
Before just paint (using an airbrush) the undercoat layer (VMC Dark Rust)
after it is dry apply 2 or 3 coat of "Worn Effects" (this product is born especially for this kind of technique) with the airbrush..
When it's dry apply the final color...When the last color is dry using a brush, toothpick or a toothbrush and water you can apply your scratches...
After the above procedure I've all sealed with Vallejo Satin Varnish and apply a different layer of oil color (MIG Dark Rust and Wash Brown).
I've also done the inside part of the rear door....