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  • Writer's pictureTom Hunt


Updated: Apr 13, 2022

And how do you stop them for good?

We have all been there at some point.

You think you're finished denibbing and polishing then all of a sudden, you see a flatting mark. But why?

Is it fillers in the compound? But why would polish manufacturers put "fillers" in their products?

The fact is, they wouldn't!

We hate to admit it but, flatting marks returning are usually down to user error.

Let's look at some compound ingredients

Abrasives (usually powder) - For the cutting/polishing.

Water - To stop the panel from overheating.

Oil - Acts as a lubricant, often mistaken for filling agent.

When the compound goes dry and "cakes", It's because the water and oil have been spent

and evaporated from getting too hot.

So because the oil makes the flatting mark shiny - we think we're done.

But we're not.

The best method to see if your flatting mark will come back?

When you think you are done, use a solvent degreaser & water-based degreaser or QC spray.

This will remove the oils and every last trace of the compound to reveal the flatting mark (if it is still there.)

Do you use this method to check your flatting marks?

Let us know in the comments.

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