Reddit reviews Hyde Tools 4101 1-1/2" Putty Knife-Flexible High Carbon Steel Blade is Tempered and Satin Finished-Handle is Reinforced Polypropylene and is Solvent Resistant
We found 2 Reddit comments about Hyde Tools 4101 1-1/2" Putty Knife-Flexible High Carbon Steel Blade is Tempered and Satin Finished-Handle is Reinforced Polypropylene and is Solvent Resistant. Here are the top ones, ranked by their Reddit score.
Stamped carbon steel blade, Hardened for durabilityErgonomic shape for comfortable gripLabeledMade in Italy
lol why are you using a screwdriver? You need a drywall putty knife. looks like this.
Sand the edge down so its about half it's original thickness (.005 inches or ~.1 mm), just enough that it can get some of the blade under an edge of the first layer.
Yeah you would kill your build surface with a screwdriver or an actual knife. PEI is a plastic so don't try gouging it with a blunt as hell steel blade. If you can't cut cooked chicken with it easily, it has to be sharper.
I think you'd be fine with any putty knife of similar size/shape to the one in the video, like these:
Or go to your local hardware store and ask for a putty knife.