After selecting the parts to assemble, grab the small angle cutters, and locate the part. Put the flat of the angle cutter against the surface of the part, and carefully clipp it out.
After removing the part, look at the point where it attached to the sprue. If there was going to be any mold lines, this is where they would run from and run the length of the part.
Take the hobby knife, and angle the blade AWAY from the fingers, scrape away the mold lines.
For any on a wide open area, like the front of the leg greaves, use the emory board or needle file to remove the mold line.
Using the plastic glue, put a small amount on the mating surfaces. Remember, a little goes a long way.
For a better understanding of the whole process, from start to finish, please take a look at the video below!