Not solving ALL the support isssues, but I:
typically use the center tube of paper towels stuffed vertically inside boxcar bodies and the like.
I made up some t-shaped devices out of brass bar stock soldered together. I bent a tab at the bottom of the T at 90 degrees and drilled a hole for the body bolster of a car. Applying two to a flat car or gon will hold the car off the "ground". Do the bottom first and then flip it over onto the "t"s.
and then there's the reversed clothes pin trick. Here's one version:
my version is re-assemble a little differently.
Ed
Stay tuned I need to get some from Amazon. I see I neglected to mention my main idea would be to use it to hold cars and other small bits for weathering or painting.
Henry
COB Potomac & Northern
Shenandoah Valley
Interesting but what happens next?
This is an idea that I haven't tried, but want to. I puchased Gear Ties, which are rubber coated flexible wires a that are great for securing tubing, power cords even hoses. They come in lenghts from 3" to 12". They end in a bulbous blob, but that could be cut off.
My idea is to put one end in a block of wood and use the other end to attach an alligator clip, clothes pin or I found some mini clothes pins at a craft store.
The pic is a Badger airbursh hose and a 3" Gear Tie
The attachment of the clothes pin or alligator clip could be epoxied or hot glued