As the doors on Firecolour are in perfect rust free condition, I want to add some protection by spraying Waxoil inside the door compartment. I can poke the nozzle through the three holes in the bottom of the door and through the removable grommet. Has anyone done this? Is there a better way?

Thats the way, or remove the door card and do it from the top. I'd recommend doing it with a compressor if possible, the hand pump thingys never seem to be much use whenever I've tried them.