Priming and 205?

[Todd@RUPES]

Why is this so? It does not make sense to me?

If the abrasive is nondiminishing I understand why it is not getting finer as you continue but I do not see why it would

• Get more abrasive ("increase cutting")
• First improve but then degrade the finish

It seems that it would eventually reach a point where it has leveled the surface as well as it can do. To continue polishing would make no sense as there would be no further improvement to the surface and you would simply be removing more paint for no benefit. It could get no better but why get worse?

I do not understand the mechanics of a polish to have the ability to first improve the surface and then degraded it? That only seems possible if the abrasive gets more aggressive as it is used. Sort of the opposite of diminishing.

Unless you are saying that as the M205 is worked and the lubricants dissipate that the effective abrasiveness increases?

Overworking the polish can reduce the effectiveness of the lubricants although M205 stays wet for a pretty long time.

However your comment is absolutely correct about M205 becoming more aggressive (in a sense) or at least leaving behind a less smooth surface. As paint is removed from the surface it contaminates the polish/pad/surface. The residual paint can cause the abrasives to clump together, creating uneven abrasives and micro hazing. You can work M205 longer, there is no harm in doing so, but if you notice hazing, reducing work time is often an effective trouble shooting tool.

 

[Jeff U]

...
As paint is removed from the surface it contaminates the polish/pad/surface. The residual paint can cause the abrasives to clump together, creating uneven abrasives and micro hazing.

You can work M205 longer, there is no harm in doing so, but if you notice hazing, reducing work time is often an effective trouble shooting tool.

Thanks, that makes sense.