Wetsuit Chafing/ lubricant
...This sounds like a combination of no lube in the suit, and dry skin.
Last weekend the ultimate suit-lube was provided by Jeff and Lavon. It's water-based, non-reactive with neoprene, slippery as heck, and odorless. Did I mention it's non-toxic? It also rinses easily off the suit afterwards....
In a quart bottle, fill 1/4 with K-Y. [might be marketed overseas as 'Personal lubricant']
Top with water, stopping halfway to shake and blend well.
Voila! The best suit-lube ever.....yes, we teased Jeff and Lavon mercilessly....but the stuff works.
Excessively dry skin happens when you don't rinse off salt water, dry carefully....and moisturize with your favorite lotion before dressing.