I considered purchasing the pricier plastic lens polishing systems, which are offered, but decided to try this stuff since it was much cheaper and was highly recommended by others.  I used it to polish the ten-year old headlight lenses on my van, which were very well scratched and oxidized so I could not see the lamps inside. But, after using this stuff with a regular shop rag, I was able to polish the lenses to where I could clearly see the lamps inside. Although, I was not able to get out the deeper scratches, It worked well enough for my purposes.