Well, if one is truly serious about this, ABC the complete vehicle first. It breaks down the majority of the mineral deposits from the glass, paint, etc.
Makes rotatry buffing much quicker and easier and produces much less of an opportunity to create major marring of the paint surface.
A dual action is ok, but in most cases just won't do what a rotary with the correct pad and product will.
The dual action comes into play after the rotary has done the heavy work, to remove any minor swirls, etc.
Of course, one must have some experience with these tools before jumping in.
Let's face it, no matter how anal one is, two bucket, sea sponges, micro fibers, natural chamios, etc, marring/swirls will happen eventually.
A dual action, in conjunction with the right pad, product and procedure takes quick care of those minor marring/swirl issues.
Here is something to consider when dealing with "mineral deposits", they have went down into the pores of the paint, they are "locked there" and if they are there in considerable amounts, one will have marring resulting from attempting to remove them.
Sort of like having a mild sand paper present when one attempts to take them off with physical processes, vs a safe chemical removal.
Kind of a quick primer on the issue, but should allow you to think it over, "what is really there and how did it get there and how does one remove these deposits without doing more damage.
Can only hope that all this makes it possible for all to really think it through.
Grumpy
