Never buy banner for a weekend toy!
This stuff
http://www.amazon.co.uk/Autoglym-500ml-Fabric-Maintenance-Pieces/dp/B005WIF4NI
It's not cheap but you should only need to apply it a few times a year. I found the best results came from applying it when the hood is slightly damp still, regardless of what the instructions state. Be sure to wipe off any excess that falls on glass and paint though as once dry, it will leave tree sap like residue that is stubborn to clean off later.
They look good but I would have taken the blades off before spraying, they'll be pretty useless now at clearing water!
shaun whats the damage?
Or was it just a very wet sludgy field (stuck)