On Monday, June 15, 2020 at 9:20:56 AM UTC-4, wrote:
Order 2481 and catalyst from Simtec.
UH

Interesting, the instructions say before applying to wipe down with
slow evaporating lacquer thinner or IPA (Isopropyl Alcohol).
instead of acetone.

Water and very fine sandpaper will get contaminants off and proved tooth for new material.
Every solvent I've tried smears contaminants and provides no assurance of a good surface to bond to.
Just one guy's experience.
UH