A set of 3 masks to aid in painting rails and tie plates. A long tool for straight sections, a short one for curves, and an open-ended tool that works well around turnouts and crossings.
Spray straight down onto the track with a rust color to hit the tie plates. Spray with a grimy black at a sharp angle to hit the rail sides.
The tools are slotted to hold .010 styrene or cardstock (business-card thickness) to prevent getting overspray on the surrounding area.