I just use McGuires 'cleaner' wax. Been using it for years on my RV.
ONE step, put on, rub off, and watch it shine.
See the top? That's the oxidized part I couldn't reach without dragging my ladder out. Below is the shine from one application of wax.
It's not rocket science and IMHO I would NOT use any of those ruby reds clear coat treatments or whatever they call it treatments on your RV. There have been 'numerous' reports of what happens when they start to wear off in patches and all what you have to do to get the darn stuff off.
Did the top part at the next CG stop when I felt more like taking the ladder down off the back of the MH. :W
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