Hey Forum, I’m not a big fan of that small chance support removal creates little indents, so I want to move to a more predictable support removal. I’m using Castable 1 and will move to Castable 2, is a Solder Iron with a sharp blade tip suggested?
If so, is there a specific model I should be looking for to do this?
absolutely, I’ve already printed very tiny part and it was impossible to remove the supports using the pliers. I adjusted a soldering tip to a very thin one and removing the supports worked very good.
Thanks for the reply, any suggestions on a specific soldering iron/hot knife? I’m trying to find something relatively small or thin like an xacto-knife, but maybe that’s not a thing. 
I’ve used a common soldering iron with temperature control. In the forum you can find a tool like this Quick support removal.
I’m surprised a hot-knife/soldering iron works since the resins are not thermoplastics. Fir giggles I did the old-school heat the tip of a junk screwdriver trick to see if I could mushroom the end of a gray resin support. Nothing happened, and I used my MAPP gas plumber’s torch to heat the screwdriver tip; so it was hot enough.
Using a soldering iron definetely works. Its true the material is not thermoplastics, it won’t melt but the heat makes it soft and you can cut through it with less resistance. 
Is it because of gray vs castable?
Possible, I never worked with castable. Yesterday I desupported clear at 350°C. Worked…