This is the method I use for control panels on my HO Australian (NSW) railway layout.
Like most things on my layout, I try to find an easy way to do things by using materials readily obtained. The panels shown below are paving the way.
PHOTO description of the process now follows.
Having marked it out and checked it, I carefully cut along the lines, missing the gaps with a very sharp (new) Exacto blade. Just deep enough to cut through the paper. Check that the cuts meet precisely! No gaps. When everything is cut, peel the 4mm strips slowly from the acrylic sheet.
You are left with most of the paper still there and some black 4mm strips where the tracks go. The next step is to spray paint the whole panel with a rattle can. I used a satin white enamel with about 3 light misting coats. When touch dry, peel off the remaining paper to leave your track diagram.
This is the final version of the Loco control panel expanded to include the 2 crossovers on the adjacent main line. Things always change on a model railway layout.
An Overview of the Operator Panels
There are 4 main Panels:
Brolgan Road – station area
Loco and turntable (sub panel)
And one intermediate panel between the yard and the carriage works. Using the MERG Canbus system allows panels to overlap so that panels can include points in the adjacent area (with permission from that operator).