2 rest or 2 "rust"; that's the question

(a bad shoulder so won't type much....)

"to rest is to rust"

"A sword, a spade, and a thought should never be allowed to rust."
James Stephens


"I have legs of iron, but to tell you the truth, they're starting to rust and buckle a bit."
Jeanne Calment

(i have shoulders of iron but...yeah, yeah you got the point already...)

"If you rest, you rust."
Helen Hayes

(or...if you don't rest....your shoulder will rust!?)