Red Max Pro Successor

So my zep is yellowing, I noticed it today. I will have to strip it and maybe I'll just shoot a coat of urathane and be done with it. They may not have the ultra violet protection in it that red max had. (The rv I gave my son is still glowing nicely with redmax, it's 2.5 years old)

I put the zep on last spring and it's only sat in Illinois for the summer, you know verses sitting in phoenix so it didnt really get hammered from the sun, but yellow it is.