Finished my repaint / 2Ring of an MTH rapid discharge / Ortner hopper. Decals are by CMR for Conrail ballast hoppers.
Paint was stripped with 99% Iso Alcohol, and a black gloss primer was used.
The Tamiya silver metallic lacquer (TS-083) paint gave it a great metal look. You can't use spray clear coats with this paint though, so the decal edges are pretty visible. I didn't want to mess with other coats (like wax or floor cleaner) since the paint is fragile. When I over sprayed one railing (brake wheel side), the metal formed into chunks.
The MTH rock load was painted dark grey then sprayed with adhesive, sprinkled with ballast, and repeated 2x more.
The coupler mount is two pieces of 1/16" laser cut acrylic stacked to 1/8" thick total and tapped for 2/56" screws. An All Nation Line 3D printed coupler shim was used also.