hi
wax suspended in white spirit or rust preventative the spirit evaporates the wax covers your metal makeing it very difficult for rust to get a good hold waxoyle is another or there is the time hounered favotite of my old grandad the oil you emptied out of your car on its last service!!
i must admit to have ended up where my grandad did i sqirt my old engine oil under pressure into all those unseen cavities once a year im a bit overdue this job actually . needs to be done on a friday with lots of drip trays under the car for a weekend as well a very messy job