Granted, I have an Artic Silver Boxster S, but I love this Maguire's sealant. I've applied two coats a few days apart, washing before the second coat. This stuff is amazing. I see no reason to use anything else.
I apply the sealant by hand. Easy on. Easy off.
I tend to use mostly Maguire's product. Readily available, and not expensive.
Here's a link for the sealant, if interested:
Meguiar's (MEGM2016) Polymer Sealant 16 oz. # M2016
http://www.meguiars.com/en/professional/products/m2016-polymer-sealant-16oz/