Engraving on Plastic Acrylic Sheets - Staining and Bottom-Up Engraving

Hello!

Just curious to know if anyone has been using their BeamBox to engrave on plastic sheets (i.e. Trotec Trolase). I’m having an issue where there remains a significant amount of residue and has been staining the font. The company providing the sheets recommended engraving from the bottom-up rather than top down when doing fonts. Additionally, I was wondering if anyone could share their settings if they have found an optimal engraving setup for these sheets.

Thanks!