On a recent trip (to Alpine, which I'll detail later), I noticed something weird in my rash guard when we got out.
First, I noticed some weird stiffness, or pellets, in my elbows. Working my way around the area I found lumps in the fabric. They were embedded - not on top of, but practically of the fabric.
I was able to extract some. It was white and powdery, so I figured it must be salt.
That makes sense, given that we had paddled for 2.5 hours in the salty Hudson River, and had gotten some waves due to contra-current winds.
Some of it I couldn't get out. I'll see how it looks after a wash.
Guess I'm an "old salt" now with my long-distance paddling.