OK not really. Actually I can’t stand MDF, at least when it comes to arcade games. My converted Robotron cabinet was sitting in the corner of our basement. It started raining pretty bad recently after a close to rain free summer. I TOTALLY forgot that one of the upstairs windows leaks water during heavy rain and it comes down into the basement. When I remembered this I went down quickly to check on the cabinet and here is what I found:
Water damage - YAH!
It’s not as a bad as the Robotron that I am restoring but it’s bad enough, especially since there was no damage before. Oh well, could be worse I guess. Williams cabs seem to get it a lot worse than others (ok maybe not as bad as Qbert but still 
). Williams cabs come with leg levelers from the factory but I never seem to see anyone with them in use. I will definitely be using mine with I convert this cab to a Multi-Williams.