English English Nederlands Nederlands Deutsch Deutsch Italiano Italiano Español Español Français Français 简体中文 简体中文 Português Português Русский Русский
    DetailingWiki Newsletter
    Get free and automatic updates on new articles
    We respect your privacy. No data is used for anything other than sending the newsletter!


Introducing a Newbie to DA Polishing

Written by:

The DA (Dual Action) polisher is considered by many to be the machine to use if you are new to machine polishing, though as discussed elsewhere, this is not always the case – rather, you should try wherever possible to try both styles of machine (DA and rotary) and see which suit your style the best as many will find the vibrations of DA polisher unsettling and this struggle with the control of the machine can actually make it more dangerous than the smoother rotary.

What you need

Additionally, you can often read on fora that DA polishers are not capable of correction, especially on hard finishes. This, in my opinion, is just a complete myth and one which needs to be busted! Used correctly, the DA polisher is a very capable machine – a little slower on some paints (but not all!) than a rotary, but no less capable in most cases! The key is in the technique and there are a few key points to keep in mind:

  • Pressure – you need some! Enough to slow down the pad rotations, or change the tone of the motor of the machine but not so much as to stop the pad rotating altogether (about 10lbs of pressure)
  • Slow movement speed – yes, very slow – about 1″ per second maximum when correcting
  • Small work area: be focussed on this, no more than 1′ square ar the start extending to a maximum of 18″ square.
  • Long work times – longer than you think, work until the products are fully broken down (for diminshing abrasives), circa 3 – 5 minutes work time

Starting off

Putting this all into practice, Gordon starts off by demonstrating a typical DA set to our willing newbie, Allie.
Polish on the pad – new pad of the day, so in addition to the two blobs of polish we have a line of polish which will prime the pad through the first set:

Dots of polish on the pad
Dots of polish on the pad

Select a low speed of around 1 – 3 for spreading the polish.
Always start and stop the machine on the paintwork, otherwise polish and pad will take off in all directions! Funny the first time, embarassing the second.
Gordon is right handed, holding the back of the machine in his right hand which will control the movement of the machine. The left hand deals with the pressure and is placed over the head of the machine to push down for the required pressure. Note the mark on the backing plate which allows you to see easily whether or not the backing plate is spinning.

polishing in action
polishing in action

The beginning

Once spread, the machine is moved to its working speed of between 4 and 5.5, and slow steady passes made to work the polish… this series of pictures shows the residue as the polish (Menzerna PO85RD Final Finish in this case) breaks down, getting clearer and clearer.


Polish being worked in
Polish being worked in

Last picture shows the polish, fully worked with just an oily glazing residue left – at this stage, the polish abrasives have broken down and the only refining you will be seeing is from the pad working with the glazing oils: you can prolong your set beyond this (ideally at a slower speed) so long as these oils do not break down, a technique many refer to as jeweling, and on some finishes this may deliver an extra advantage in terms of gloss enhancement.

Speeding up

Speeded up to double-speed (perhaps slightly faster), this is how the set looks on video:

Note at the end, when the pressure is released, you get additional lubrication return to the finish and this can be used if desired to lengthen the set for additional jeweling: pressure compresses this into the pad. The release of these is a key to the “rejuvenating technique” that we use for PO85RD3.02 Intensive Polish which will be a subject of another thread . Note the small working area, slow movement speed (this video is sped up remember!), long working time and the pressure over the machine and what this looks to be doing to the pad movement.

In action

Now, over to our newbie:

Note the initial newbie mistake – machine off the paint switched on! Own up, seasoned machiners, how many of us have done that?

Gordon keeps Allie on track for her first go with the DA polisher – I’m sure she’ll share her feelings of the DA, she didn’t seem to enjoy it compared to the rotary in terms of comfort! But she made a good go at getting the machine to do its job, and demonstrated that a newbie can get going with a DA polisher.

Different related articles

  • Why you shouldn’t tape off 50/50 shots
    A very common and popular practice on social media is the picture of the 50/50 shot. This shows a very clear line that divides a fully polished section and an uncorrected section. This is done to demonstrate the difference you can get from a full correction....
  • How to remove dried up polish
    Dried up polish can be very unattractive. It is also a hardened substance that can cause surface damage when rubbed over the paintwork. Although the detailer should have removed this, it can be encountered on some jobs. Dried up wax residue can generally be approached in the same way....
  • The best microfibre towel
    Detailing Miscellaneous
    It is often asked on detailing fora and social media: "what is the best microfibre towel". Off course there is a difference between certain products and brands, but it is important to know what you are asking. In this guide I will try to explain what the problem is with this question unless it is asked more in-depth....
  • What is masking tape
    Masking tape is tape designed to be applied to sensitive surfaces with the aim of masking off certain areas and easy and residue free removal. Masking tape comes in several sizes and can be varies colors. It helps to prevent polish from getting onto surfaces you don't want it to get at....
  • What is a Dual Action polisher
    A Dual Action polisher is a polishing machine that uses a circular motion combined with a spinning motion to create a rational double action. This motion is useful when polishing a surface by machine. The Dual Action polisher is famed for being easy to work with, making it ideal for beginners....
  • How to remove a ceramic coating
    Ceramic coatings are very strong forms of protection, but they are not eternal. Eventually they need to be removed in order to prepare the surface for a brand new application of protection. This means the entire layer of ceramic coatings need to be removed....

Links to this article

There are no external links to this article. Yet.

Stay up to date with our free newsletter
Always be the first to know about new updates, articles and other informative content.
Don't miss out, opt in!
We respect your privacy. No data is used for anything other than sending the newsletter!