Mando, I can tell you, you lost your bet
It`s an easy work. Time to spend for the 4 Spinners takes a little more than 1hour (depends on the BEER tins
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Abrasive is like a fibre carpet. I use it to work and clean wood, metal and tiles. The surface of the treated part gets very smooth and without loss of material.
The fotos show the easy procedure. Don`t give to much pressure to the Abrasive. Compare the SS versus ALU Spinner (from TRIGO).The difference is only the colour of the materials.
Easy to keep them clean. Only a bit of Anti Rost Spray, a towel and it is done.
Rico