This product did exactly as I had hoped it would. I had an old Casio work wastch that could barely be read through the scratches. Although, it was not able to completely remove the deep scratches- the lens is clear enough to read in any light. I also, tried it on some sunglasses- not great results, but, there was an improvement. Note: Not recommended for cheap sunglasses. Works well on other hard plastics as well. Overall, I am quite happy with this product and have already told many friends of it's performance.