What are you mostly working on?
Production Detailing?
Show Car Detailing?
D151 is a one-step cleaner/wax for high production detail shops, it's not intended for or formulated for show car detailing, it does work really well as a one-step cleaner/wax and is very versatile in how it can be applied and it's able to tackle a wide spectrum of paint conditions but do keep in mind what it is and who it's for.
M83 works really well as a cleaner/polish, by this I mean that it removes swirls and leaves a nice finish. People do have problems with it becoming gummy when their pad becomes wet with product and as it dries it does become dusty.
The most important thing you can do to make working with M83 easier is to clean your pad often, as in after each application of product or after every other application of product and when your foam pad becomes wet or saturated with product, switch to a dry pad.
Sometime when you're using M83 with a DA Polisher, pay careful attention as to how the product performs when you first start out, then pay attention to how the product performs as you continue to work around a car using the same pad, you'll notice a fall-off in performance as your pad becomes wet with built-up product that gets into the foam pad making the foam wet.
Switch to a clean, dry identical pad and start buffing again and see what you notice? The product will start performing like it did when you started out. For some reason the wetter a foam pad gets seems to affect how the product works on the surface. this is the same for both rotary and foam, so before starting a project try to have plenty of clean, dry foam pads on hand and switch to a clean dry pad when you notice performance falling off.
Honestly I have not worked with this product a lot, as I don't do much production work, from my experience, (and other can chime in if they like), it has pretty good play time, as in the buffing cycle is longer than M83 at least with a DA Polisher. It's also very easy to wipe off whereas M83 can sometimes get gummy and be more difficult to wipe off.
Another huge difference between these products is they're apples to oranges in that with M83 all your doing is cleaning and polishing the paint, with D151 your cleaning, polishing and leaving behind protective wax coating which M83 does not do. The visual difference between the two is the paint will be much shinier with D151 because of the wax factor.
Actually, I've been told the type of diminishing abrasives used in M80 break down more quickly than some of our other cleaner/polishes but because it's a wetter product you have what's called a longer buffing cycle or as we say here on the forum longer play time. That means the cleaning action takes place in the first part of your buffing passes and then as you continue to work your pad over the surface the abrading falls off and now you're just polishing and its a combination of the foam, the polishing oils and any residual product on the surface working together for a polishing-effect that creates a glossy, smooth clear surface.
See my notes above about dry pad versus wet pad and if you have not tried using the product in this way maybe give it a dry.
