So I really don't need to follow 151 with anything like I do Megs 105?
Just to chime in...
M105 is a true compound formulated, marketed and intended for use in fresh paint environment, i.e. body shops At least that's the primary market for this product, the fact that it works exceptionally well for an aggressive compound, that is it cuts fast and finishes out like a polish is why so many people in all dimensions of the car hobby like this product.
It offers no long lasting protection ingredients like you find in a wax or paint sealant as that's not it's purpose to protect paint. If it did have protection ingredients in it then it would no longer be a true compound but a one-step cleaner/wax albeit a very strong cleaner/wax.
D151 is a true cleaner/wax. It's for cleaning, polishing and protecting paint in a single step. Because it contains protection ingredients it's not "Body Shop Safe" but perfect for use in the detailing business where paint adhesion isn't a concern.
Both a very good product for very different markets.
The D151 is a SMAT product and this makes it versatile in that you can stop buffing with it when the defects are removed or you're happy with the results, unlike a diminishing abrasive product that should be worked until the abrasive have all been fully broken down.
Another good one-step, cleaner/wax that I've been using on my daily driver is the Optimum GPS, it's a spray version of a light cleaner/wax.
