I am a beginner myself. But, starting out into this detailing hobby, I promised myself to never use a machine (hand only).
So, to meet my personal goal of "hand only", I needed to develop "a method". Here is how I learned to remove light scratches and micro marrs.
I practiced on blank CD-ROM disc and the clear plastic of CD Jewel cases. The concept is that the plastic CD Disc and/or Jewel Case will behave that same as a painted car surface. So, I take a paper towels and rub hard into the plastic surface to introduce swirls. By the way, this is a great way to test your washing and drying cloths to see if they produce micro marrs. If your drying towels can produce scratches into the practice plastic surface, the towels will probably micro marr your car.
After producing a marred surface on the practice plastic, I take a microfiber (nothing ever touches my paint except a microfiber - lesson learned by testing on the plastic) and begin to practice using Mequires M80. After you learn to polish out the swirls in the plastic, you are ready for the real paint. Yes, it is possible. I can easily do it - to take a scracthed and heavly marred palstic surface, and polish it out to be perfectly clear with no scratches (prestine). But, I had to practice alot on the CD Disc and Jewel Case before I aquired the talent.
And, I have been able to polish my daily driver with neglected paint to have it shine like a fresh paint job. This is by using M80 applied by hand with a microfiber bundled into several folds.
Below are my personal notes (to myself) :
Definition of a Pass = a once-over with working the M80 into the work area. I use circular motions. A "Pass" is similiar to one coat, but the M80 is only applied at the beggining of Pass #1. Then, Pass#2 thru Pass #7 are similiar to apply coats WITHOUT adding any more M80 - just keep working the M80 that is on the surface and in the microfiber. Do NOT turn the microfiber - once you start Pass#1 thru Pass#7, you should be rubbing the surface with the same patch of microfiber. This is because you are breaking down the abrasives with each pass into a finer abrasive with each pass. And, you need the broken down abrasive from each previous pass to help buffer out the remaining pass. This process is repeated until by the time you get to Pass#7, the abrasive is super fine and polishing the surface into a marr-free surface.
Trick is to never have next pass to be less pressure than any previous passes.
It is NOT really nessecary to start first pass with light pressure.
The first pass can be medium or heavy pressure (depending how deep you want the M80 to cut), but for a beginner it is easier if you use light pressure for the first three passes.
Just make sure that all following passes are the same pressure or progessively heavier than the starting pass.
Pay attention to passes #1 thru #3 to have approx same pressure, then pass #4 begin to increase pressure
significantly, then pass #5 increase pressure significantly more than pass #4. Passes #5 thru #7 will probably be the same pressure as pass #5 because arm is too tired.
Other trick is to NOT to use too much M80 compound. The compound will begin to dissappear by pass #4. Passes #5 thru #7 will appear to be dry with nothing there - just keep rubbing although it appears dry.
Other trick is to use expensive microfiber only to apply M80. Anything else will marr paint.
After polishing, use some drugstore rubbing alchol (70%) to rinse out the polishing oils left behind by the M80. I am a new Zaino users, so I am aware of this requirement.