Hi there Keith i'd read your reaction on my model "Heavy Damaged", but also i read your' question,
well i will tell you how to do real rust, this rust is a product of MODERN OPTIONS and you can buy it in a duo package of two small plastic bottles, in one of them there is INSTANT IRON base coat and in the other one is the INSTANT RUST ntiquing solution, so first you have to bring the "instant iron" on places where you would like to have the rust, this base you let dry for 15 or 30 minutes and then you put the "instant rust" on it this oxydation will work on the iron base and after a while you have the look you wanted. Watch!!, the more oxydation you bring on, the lighter the rust will be colored. Tip after doing the rust you can use abit of black powder so it looks more realistic.
Each small bottle continues 59 ml of product, the cost of it (atleast in the Netherlands) is around 22 Euro's.
Succes.
If you have questions about it let me know i'll try to help
Greetings Eric Verberne