I tested this out on my transom before doing the hull and I'm glad I did....unfortunately it still took a long time that'll I never get back. I thought with some hard work it would do the job and it didn't look good at all afterwards. You need to use a lot of this product for it to do the job and it will get expensive without the final result desired. I will keep the kit to bring some shine to my hull stripes....hopefully it's enough to do that job. Needs much to be desired...unimpressed again by Meguires. Note: my boat is not heavily oxidized and this should have handled the job.