I have watched my son do exactly that. I have thought about covering them when they aren't in use, which would be 364 days, 20 hours and 12 minutes each year.I remember deciding to really clean my drums...once.
I have an 8-piece Tama kit, Pearl heavy-duty hardware and about ten cymbals.
I took apart rims so I could clean around where the screws go, I partially or completely disassembled hardware to get to all the little nooks and crannies, then polished the cymbals and put everything back together.
I don't recall, specifically, how many hours this all took but there were two things that I remember thinking when I was done:
1. The kit looked beautiful
2. I am NEVER doing that again.
Guitars are so much easier to deal with!
Yeah, guitars are much easier.