Another vote here for the PB's sealant 2 coats on the wheels and just rinse with every wash
The only other thing though it could also be down to the AIO or 845 that went on before the sealant :D
Never found the need to work sealants and waxes in so i put an even coating over the car then buff off.
I don't use circular motions either, front to back strokes only (that sounds rude)
That kind of gets to me Silver looks clean and shiney but you never get that deep mirror shine you do with deep colours, reason why i'm not keen on posting pics.
It's nice to be able to see the difference so you know your hard work has paid off. Is it just the bonnet you've done or is there a stripe all the way down the car?