Reply to "Cleaning my train cars and engines? Update"

Thanks Ken

At this point a feather duster won't work,but I was thinging along the lines of a small paint brush and warm water with a drop or 2 of dish soap. I'm thinking if a small paint brush would leave scratches,and how to identify bristles that wouldn't leave scratches

Whatever I do I'm going to start with a standard box car,clean it,let it dry and take it out in the sun and check for results.