I'm a 303 guy for treating my top, and many forum members are Ragg Top users, but here's a Miata thread extolling the virtues (and UV qualities) of Chemical Guys. https://forum.miata.net/vb/showthread.php?t=642783

 

But they are MIATA owners. Who would trust a MIATA owner's judgement? That's like asking a guy in a Mustang for directions.

 

Pizzaguy haha i almost had my coffee out of my nose reading that !

I did find the 303 protectant was a real pain to get off the glass and paint cos i didnt mask it off properly.
I might try that Chem guys stuff ,i Really like their paint products ,i dont use anything else now.

 

Have you guys tried Griots??