Thanks for the feedback Waste! Though I don't have a SWCG, I do keep around 3200 ppm of salt in my pool. Excellent observation regarding the corrosion. As I stated, this year was the worse and the first thing I tried was water, obviously to no avail. I assume all pools are the same but not only do I have Aluminum cups & Stainless Steel Rails, but everything is bonded together with copper wire! So I guess we not only have 3 dissimilar metals but maybe even some low voltage current? Either way, I'm going to not only grease and caulk next year but will try painting of the cups as well. Thanks again.

Dave