Detailed knowledge for detailersArticles related to correction
A test spot is done to determine what combination of polish, polishpads and technique will give you the best results when correcting a surface. A test spot is done in a small area before you start to fully detail the entire vehicle.
This is a more long term solution for dealing with swirl marks and involves removing a thin layer of the clearcoat where the swirl exists down to a flat layer where there are no swirls. This requires a cutting polish and a lot of heat to be generated to achieve this and is therefore best suited to a machine polisher, although results can be achieved to a more limited extent by hand with plenty of patience and strength and stamina.