This guide was written by the lad I detail with....put the kettle on: -
A product that has recently come to promenance in the world of detailing is Detailing Clay. In this thread I aim to write a general guide to what clay is, what its used for and some generic tips for how to get results from clay. I will focus on the use of clay for the removal of bonded contaminants.
What Is Detailing Clay??
While clay is growing in popularity with many detailers now, it has certainly not become a well known "household" car detailing product. Detailing clay is a substance that is designed to remove bonded contaminatns from paint, leaving the paint smooth as glass, allowing easier and more fruitful applications of polihses, glazes, sealents and waxes. Detailing Clay is wiped gently across the paint which needs to be lubricated with a lubricant such as a Quick Detailer spray.
Clay, like polishes, comes in levels of aggressiveness - if you are a beginner with clay, do start with a mild clay such as Meguiars Quik Clay, Meguiars Professional Mirror Glaze Clay (mild, the blue bar) or Sonus Green Clay. These mild clays should be enough to remove bonded contaminants from most cars, only step up to a more aggressive clay if absolutely needed.
Clay can be used on paintwork, glass, and wheels. Always use separate clay on each - ie dont first clay your wheels then use the same clay to clay your paint, as all the brake dust embedded in the clay from the wheels will scratch the paint.
What Are Bonded Contaminants??
When you come to wash your car, the paint will be covered in lots of fresh contiaminats such as dust, mud, possibly bird boms and many others. In addition, the paint will also have a growing amount of bonded contaminants attached to it, which accumulate over time:
When you wash your car, the fresh contaminants are removed from the paint and the paintwork looks clean. However, washing will leave behine the bonded contaminats which are attached to the paint as if they had been glued on:
These bonded contaminats are hard to see, so after washing your paintwork looks clean. However, if you gently run your fingers acorss the paintwork you may feel that the paintwork feels rough - a bit like stubble in a way. This roughness, grittiness that you are feeling is the bonded contaminants in the paint.
Examples of bonded contaminants are:
> Brake dust - sharp, so embeds itself in the paint
> Industrial fallout
> Tree sap - very sticky so adheres strongly to the paint
and there are many others as well which you're car is subjected to on a regular basis.
Removing Bonded Contaminants - Clay
In order to remove the bonded contaminats and restore a glassy smooth feel to the paint, detailing clay is used. As well as leaving a pleasingly smooth feel to the paint, when you come to polish, glaze, seal or wax, it means that you are now sealing in remaining bonded contaminants if you have removed them by clay. Simply washing and waxing will not remove bonded contaminants, they will be left behind and then just waxed over.
Clay basically works by grabbing hold of the bonded contaminants and pulling them off of the paint surface:
The contmainats become stuck in the softer clay where they remain. A safety note when using clay here - these bonded contaminats are stuck into the clay and the clay represents a flat surface. Therefore, surface marring can occur if not enough lubricant is used, or the clay is not kneaded regularly enough to a clean side - please see also the section on using clay...
This leaves the paint finish glassy smooth. Clay can remove the bonded contaminants listed above, however some adhesive contaminants such as tar may need a dedicated tar remover as they are very highly adhesive.
Using Clay
Before claying, always wash fresh contaminants off of the car. First and foremost, always follow the manufacturers instruction for the correct use of their detailing clay. What follows here is a generic guide of tips for the safe use of clay which I use from experience o
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