I have been looking at getting a dual action machine for probably the sole task of applying paint cleansers and glazes. My car only has some light defects mainly swirls due to I think the previous owners was technique as I have always used the two bucket method. From having a look at another post on here it seems hexlogic white and possibly black pads would be the way to go. Would also anyone advise the use of a paint depth gauge? Also if I wanted to achieve more correction what polish would people advise for Audi paintwork? The last thing is someone convince me having the machine and using maybe 2-3 times a year is a justifiable cost?