Make your work sparkle and shine using modelcraft glass fibre pencil for a propelling pencil action that exposes more or less of the glass fibres this fibreglass abrasive stick is contained in easy to use pencil type case that is ideal for accurate and rapid cleaning de rusting and surface preparation on a variety of materials the pencil can clean metals plastics and woods ready to be worked on or to brighten your projectspropelling pencil action exposing glass fibresworks on metal plasti