As an experinment, I was able to purchase locally a tube of Mass paste polish and bottles of liquid Flitz and Brasso.
I used clear plastic from a food carton as a test surface and polished three sections of it using each of these three polishing compounds.
I used my fingertip to do the polishing, so that there would be no abrasive effects from a cloth or paper towel.
With the Maas, I could not feel any abrasive component in it. However, I could feel about the same amount of abrasive in the Flitz and the Brasso.
After washing the residue off the plastic, and drying it carefully so that it did not get rubbed in the process, the areas polished by the Flitz and the Brasso were visibly more affected by the polishing action than the area where the Maas was used.
Bottom line, For the most highly finished surfaces that I want to maintain, I will use the Maas. The Flitz and the Brasso will be reserved for more general duty--and I need to find lots of stuff to polish with them in order to use up what I now have on hand!
By the way, my 8x loupe suggests that for most of the surfaces on my Randalls, the Flitz and the Brasso probably will work just fine without any adverse effect on the shop finish. However, I will only use Maas on my RMKs just to make sure, and certainly on knives that have very high gloss polishing on the blades or any hand rubbed blades that have a distinctive direction in the finish.
I did not have the paste Flitz available for this experiment, nor a tube of the paste Simichrome, so even though I have concluded that the liquid Flitz is more abrasive than the tube of Maas, I will still be interested to compare Mass to both of these later.
Larry
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Larry W. Williams
RKCC #CM-041
ABKA #046
RKS #1246