Derek
Basically the ventilated flap buffing is just another type of buffing wheel just like the Spiral Sewn, Loose Section, or Canton Flannel.
The big difference between the 4 different buffing wheels I’ve mention in reverse order are:
Canton Flannel: An extra soft wheel, recommended for all final coloring operations. This wheel will give you the most brilliant finish of all the buffs.
Loose Section: An extremely flexible wheel for color buffing. Gives very slight cutting action and is great for hard-to-reach surfaces.
Spiral Sewn: Well balanced long-wearing wheel for coarse buffing and cutting on all materials. Made from selected cotton material with continuous spiral sewing with 3/8" spacing.
Ventilated Flap:
View attachment 427186
For A Medium/Fast Cut On Contoured Hard or Soft Metals
The flap design of these Buffs keeps your work piece cooler, reducing the risk of warping. The flaps tend to "slap" the part, resulting in cutting action that is twice as fast as spiral sewn wheels.
Emery Compound: Contains Emery Grit - Very fast cutting action. For coarse buffing, removing scratches and burrs from iron and other hard metals.
So as you can see it’s not your traditional abrasive bonded sandpaper type flap wheel (basically sandpaper strips bonded to a center spool). It’s a buffing wheel that you actually apply emery compound to for fast cutting on different metals.
If you look in the pic I posted earlier you can see the Ventilated Flap on the drill.
By no means will the Ventilated Flap fatten the surface you’re working on unless you just want to do so. I’m one for saving any logos, #’s, or anything else I can versus sanding or buffing them off. To me that shows the difference between the guy who just wants to get things done, and the rest of us who are willing to spend the extra time to do it right.
I’m by no means saying it the right way or the only way to do a part, I just feel it speeds up the process of doing a part with minimal amount of sanding is all.