Rubber, injection-molded, and zinc-magnesium-aluminum alloy products undergo hardening and embrittlement as temperatures decrease, progressively losing their elasticity. Notably, below their embrittlement temperature, even minimal force can cause these materials to shatter. At low temperatures, the flash (excess material around the product) embrittles more rapidly than the product itself. During the critical window where the flash has embrittled but the product retains its elasticity, high-speed spraying of specially designed plastic pellets is used to impact the product. This process effectively removes the flash without compromising the integrity or quality of the product.