Sealing the finish is very important, as it will help to prevent oxidation from setting in again, thus reducing the need for future polishing. On bright metal under the bonnet we favour Blackfire Wet Diamond All Metal Sealant, as it a high temperature resistant formula that has proven itself to be very durable. It is also superb on exhaust tips and split rims too, and has given us around four months of protection per application on our own cars. More details here...

http://www.polishedbliss.co.uk/acata...nt-engine.html