I have used both Meg's heavy duty and the Diamondite kit. I prefer the diamondite kit it seem's to work better.and there is no sanding involved.You can also sand polish without the kit and protect the lights when you are satisfied with spar varnish.
I won't even consider shopping elsewhere I LOVE AG. never any issue's with my orders . Phone calls or e-mails are always returned quickly. they have the best customer service of any company I have ever dealt with thank you AG.