Jagster said:
Can I ask you or anyone else about clay bars? Have you ever used them or do you use them? I've also seen liquid clay bars aswell, there's just so much out there it can be difficult to see the line between a worthwhile purchase and a waste of money
The theory behind clay bars is to remove bonded contaminants and yes they work but you will cause some micromarring especially if the car is heavily contaminated. I am not a fan unless I really have to since the advent of fallout removers.
Most of the gritty feel you get on the paint even after washing is iron contamination from brake dust, railways and industry. Products such as Bilthamber Korrosol or CARPRO IRON X once sprayed on will dissolve the iron without harming your paint and in doing so leave it smooth after pressure washing it off.
I have a white Epace and it was the first thing I did after I got my car (dealer was told to remove the covers and basic pressure wash no prep). After spraying the car it bleed purple like you would not believe which is the produce dissolving the deposits. I was surprise just how much my car blend until I remembered it came from Austria and was lying in a compound in England for a while I expect. After that I wiped the car down with tar remover and felt no need to clay it.
Don't get me wrong claying works just be aware that you will need an abrasive polish afterwards which you would do anyway or why bother. It's easy but needs extreme care. Clay mitts are easier but most agree they are more prone to marring .