There are a number of products on the market to produce this wonderful (realistic) condition BUT am I the only one that uses none of them relying on my skills
with Acrylics to produce the effect of rust and for that matter oil.
My recent Gn15 Loco modelling has resulted in favourable comments on the grotty finish (are they all being kind
All my Locos are now spray painted using Car Sprays or sometimes specific model sprays and if I get a run I'll leave it and this becomes a rust area. Interesting effects can also be achieved (totally random) if a miniscule amount of grease is introduced onto the undercoat b4 the finish coats are applied - again the result will be a subsequent rust area.
I'm a complete greenhorn in this matter and others will have their own pet methods; however I thought I'd start this thread to see what transpired
ps if you try the grease trick I'm not accepting complaints if it doesn't work
Perhaps I should add that the reason I use Acrylics is that I paint with them and they sell so I must be doing something right even if the modelling is basic!