Got tired of the slipperiness of the bare steel floor on my MX5200, so decided to make a floor mat from it. I got a 3'x4' by 3/4" mat from Tractor Supply, and used a cardboard template and then an oscillating tool and router with spiral upcut bit to fit it. Here are the results:
My B7800 has gone through 3 floor mats due to the brutal desert sun. I bought a can of Herculiner ($26) truck bed liner and painted it on the bare desk. Ended up with a nice non slip finish and enough left over for 2 or 3 more coats.
The multitool definitely cut faster and cleaner, the router was necessary for the non-through cuts like the recess under the pedal for clearance. No burning or smoke with the router, but made a pretty good mess of black shavings.