WD40 may be a bit of a no-no. Possibly an urban myth, but a motorcycle mechanic once told me that long term use degrades rubber components.... Of which we have a few on a bike. So I never really use it. It's also a bit rubbish as a lubricant, unless you get it on to your discs or pads!! If I do use it, I spray it onto a cloth first and then use that.
Squirt is biodegradable isn't it? Not sure about the ceramic, but I hardly use any and it dries... dry. Gave up on oil [real or synthetic] years ago as it is just so messy and never lasts. It also helps to have a good quality chain right from the off - XTR or Yumeya chains are worth the small additional expense.
The other thing is, don't ride through the puddles so much!
Thanks for the positive comment regarding the t-shirt! Took me a year to do as I'm not a graphic designer. I'll get some better photographs when I get time. They're just a bit of fun; I could never find any bike t-shirts that I liked and wanted something different.
www.muddyground.blogspot.com
Remember: there is no "I" in work!