It was as easy as said above. I copied and pasted my mates write-up

We sprayed it with all purpose cleaner, then degreaser, rubbed the degreaser in with brushes, sprayed it with degreaser again then left it for 10 minutes After that we hosed it down then let the engine run for around 10 minutes with the bonnet shut. We then dried everything with kitchen towel then sprayed it with the sealant. Wiped that down with kitchen towel then took it for a good thrash

I think that is the gist of it