Don't use an exacto knife. Go to the hardware store and buy a pack of extra razorblades. You can get them in quantities like 25 or 50. They go dull decently quick, but theyre easier to handle since the blades a lot wider. I've cut tons of foam boards by hand with just the blades.
FaustianAccord t1_is8xpw6 wrote
Reply to does anyone know how to trim styrofoam? by friggityfrogg
Don't use an exacto knife. Go to the hardware store and buy a pack of extra razorblades. You can get them in quantities like 25 or 50. They go dull decently quick, but theyre easier to handle since the blades a lot wider. I've cut tons of foam boards by hand with just the blades.