Just want to know if your paint is still beading water ang it appears to still have a good protection on it could you apply more protection to it or should you strip off the old and start from scratch?
If the paint still looks good and it feels smooth, I will add more coats of protection.
I usually use 4* UPP.
If the paint is a little dirty and I don't have much time I will go over it quickly with Meguiars NXT on a polishing pad ... not the same look as UPP but it sure is a time saver and it looks good too ... just different.
Just my opinion!