It does not tell me what grit of SP is included in the kit, but please keep in mind, these kits are designed for plastic and poly lenses, not the glass of your foglights.

You will need to play around with it to see what will work, and I am hesitant to give you any exact answer as I have never done this particular job and do not want to tell you something too gritty and have you be upset with my advise when you can not polish out the scratches. You need to keep going with something heavier until you get the desired result. It should not take you hours, either.

PM me if you want to continue the conversation for the sake of everyone else.

Hope this helps.