The kit contains pretty much all you need to buy in order to restore old, yellow, oxidised plastic headlamps.
You will need some masking tape to mask off the adjacent body panels to prevent accidentally sanding down the paintwork.
The whole kit costs about SGD35 and it is way lesser than having to replace the entire headlamp housing. This is the first product I've seen that includes a wipe-on clearcoat. I hope it lasts! Shall do a review on this after some time to see if it lasts.