I've recently redid mine, wire brush in one hand, waxoyl brush in the other.:nenau
I used one of those mortar mixing boards, about a metre across, made of heavy rubber, under the Mav, 1 to collect all loose bits, and to 2 to catch the drips.
Easy to clean afterwards.
Spraying tends to put more on you, your hair and the floor:doh
Keep it off the exhaust, and rubber hoses and the tyres, it can cause the rubber to expand, but it does go back, but I don't know if it affects the strength of the hoses or tyres, so not worth the risk.
Best done before too much salt is put on the roads, and do behind the plastic wheel arch trims, as I suggested in an earlier post. Also remove the front inner wheel arch splash guards, then do the inner and outer wings.
Also remove the metal bash plate, and engine under cover, and do areas there too.
In the very early days of Mav ownership, I used to have squeaks from the suspension, so I coated all the suspension bushes, ARB drop links, track rod ends etc etc, and in 18+ years, I have only replaced the front ARB drop links, all the rest is original, and still no squeaks, so the waxoyl has helped preserve these components. I also still have the original CV Boots too.
When ever I see threads sticking out, like seal belt mounting bolts, seat mounting bolts, handbrake cable equaliser, etc I have always brushed some waxoyl on, and if ever I need to undo a bolt, they separate easily.
I also did the brake pipes up to the rear of the cylinders, and when I replaced the rear wheel brake cylinders, they undid without the usual barley sugar twist...:thumb2 All brake and fuel lines are original. Thanks to waxoyl.
So since I am certainly the owner who has had his vehicle the longest time, I swear by waxoyl, BUT it is NOT a one off application, and leave it for a few years, it washes away from under the wheel arches, and can flake off.
The front lower wishbones are very vulnerable, and these do rust from the inside too, you will be surprised...
You need to top up the waxoyl every year, or do what I do, have a jar of waxoyl next to the tub of grease, and when you have to say remove a wheel, or change a brake cylinder, or even change the oil, just take a look, and re-coat any area showing signs of corrosion or flaking waxoyl.
Over 18 1/2 years I must have applied 4, 5 litre cans...
The place I wish I had spent more time on, is the front seam of the fuel tank, this is very vulnerable.
Hope this helps,
best regards,
Rustic