To wax oil or not to waxoyl

If you have it done professionally they will probably give you a 5 yr gaurantee. I had my old Jag S'Type done by a company who came to your garage they gave me a 10yr guarantee but must get it checked after 5yrs by them. I did do it myself on my XJS but what a mess, it took me all weekend looking for places to drill or poke the nozzle then grommeting them after. Its also a bugger to get out of your hair!!
The s'type was completed in about 6 hrs and they knew exactly where to apply the WO and used a compressor as apposed to my hand pump technique. i still have both cars the xjs is now 10yrs down the line and the S'Type is 8yrs on there is no rust showing anywhere and they both still win concours shows.