Yes, that is the one - I looked for it but couldn't find it to post the link. That postings is one of the things that underscores your signature for me.

That is not a fence I am going to pee on!
Amanda, I agree with your comment about some of the maintenance being overly complicated and expensive.
I would not do the rear tire/bearings until I had to. But I would not mess with powder coating the back wheel anyway - you cannot see it enough for it to make a significant impact - certainly at the price. I would spend an afternoon cleaning it up, masking it off and painting it - in place - a flat/semi-gloss black - or red or whatever color works for you. It would take some time, and it is tight work, but with patience, almost anyone can do it.
As I said, you cannot see that much of it or get that close to it. It will usually be dirty. Most people - even up close - probably could not tell the difference - and for sure, nobody would know how you did it while the Spyder is in motion. Put your money on the front where it really shows.
Tom