Stippling the gripping surface of polymer-framed guns is usually done with a soldering iron.
Stipple Diagram
A Brief Guide on Grip Stippling
Glock 43 – Getting a Better Grip (Stippling) – A Blog about
Pistol Stippling – Gledhill Customs
How To Grip Your Pistol, And Why It Matters – Relentless Tactical
Generally do you stipple or grip tape? : r/handguns
Recommendations for stippling and undercut on a G19
DIY Workshop: Stippling For a Better Grip on Your Pistol - Athlon
How to stipple a gun