Mirror acrylic always throws sparks in my machine… Is this normal for the material? I buy it from either Cerulean Tides or custommadebetter.com. I’ve engraved and cut and with both it sparks quite a bit. Just want to make sure it is safe to use.
Welcome to the forum.
Mirror acrylic is extruded rather than cast acrylic. It will behave differently, but it is safe to cut and engrave.
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I have the same issue. I used med red acrylic for all my mirrored acrylic i apply dawn soap on the mirror side no masking and ut cuts like butter 
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