Little dots after engraving

Need some input. I am engraving anodized aluminum plates for some plaques. The finished product is precise, the only thing is, upon further inspection there are little dots around some of the text like paint splatter. I am am using a 50w doing 20 pwr and 300 sp. I tried slowing it down to 280 and 250 with the same results. How can I fix this little dot problem?

Please share a picture of the original artwork and what the resulting output looks like and we can go from there.

That’s what it is doing…don’t know why.

Those look like reflection from the aluminum, spraying the beam everywhere. Turning down the power, or going faster may help.

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