resin parts

Use the saw to separate the piece from the block. Clean up any remaining excess with sanding sticks or needle files.

Wear a mask and clean up the dusr

Hello!

If the pouring block is really massive (square inches to cut through) it's got to be a saw. But if it's a little lighter, I usea so called plastic cutter - like this one:

You use this knive by scouring the surface to be cut with the point of the knive. It cuts a nice, curly swarf or shaving and creates a groove in the pouring block that can go down to the other side of it and allows the pouring block to be safely broken off the part. The cool thing here is that at this point you don't create any dust, just the shavings. This knive is generally nice to have, because it also is good for cutting styrene sheet and can even be used for re-scribing panel lines on models.

Hope it helps - have a nice day

Paweł

Or you can use a cutting disc on a dremmel. 

Gerhard

Or you can use a cutting disc on a dremmel. 

 

Or the little circular saw blade for the dremel.  Also, if you use a hand saw like a Zona or the one from X-acto, lubricating the blade with water helps the cut (either with resin or styrene) as the drag you feel is from slight melting of plastic.  Those saws do not offset the teeth very far for clearance.