Good use of a mask. That looks great!
A useful product for this is a vinyl sheet of masking material like these:
Cutter Pros. You can vector cut the logos and then weed the parts out you don't want. That would save a little time on engraving.
Another cool way to do that is to engrave the wood and then paint the whole thing. Then run the whole panel through a surface sander or use a palm sander to remove the paint from the non engraved areas. Where you engraved will be recessed so the paint will remain in those areas.