i haven’t been able to experiment with acrylic in my laser yet, but here’s my advice based on previous Epilog experience.
engraving with masking is tricky, as it can get hard to remove after being lasered. like pulling off sticky lace, if you know what i mean.
however, if you want to keep the masking on for cuts, i suggest this:
use a low-level setting to cut through it initially. then, you can use higher-power passes when it hits the actual material.
if you use too much power right away, you will definitely get flareups. i’ve even experienced flames with some paper masking before.
as soon as i’m done with my project using paper, i’ll update with my experience, as i have a surplus of scrap plexi with all sorts of masking materials on them.