29th President: Warren G Harding, 1921
Nap = 29 (Harding was the 29th president)
Hard = Harding
Paint = 921 = 1921 became president
Warranty = Warren
The president took a nap (29) after fitting new hard (Harding) wood flooring to the oval office, but he didn't notice the spilt paint (921 = 1921).
Connect Harding with Warren
Fortunately, the hard (Harding) wood flooring was covered by a comprehensive lifetime warranty (Warren).
NOTE: The way Mammoth Memory remembers Warren is to think Warren – warranty.