Which wax for permanent outdoor parkers ? / MFTs and pads to clean by hand

Servus ! The questions are already in the headline. With which wax (or other sealing) one can protect a vehicle, which is constantly standing outside, best and in the long term most ? gloss etc. plays a subordinate role here, rather it concerns the protection above everything in everyday life pours down on the varnish or flats The second question : So far I have avoided to put my applicator pads and MFTs in the washing machine, for fear the laundry could follow Is this concern justified? I use the “even coat applicators” of Meguiars, which in the new state have a snow-white surface. At the latest when one was on a red Uni-Lack it is never much to see from the original color of the pad ^^ With 40 degrees hot water and a proper portion of detergent in the hand wash basin I can get out the rest of the care products apparently, but the red / red In addition, brownish stains of tarts that were removed from the pad remain. I have not yet had to clean/wash the MFTs (Meg. Surpreme Shine). For tips I would be very grateful!