I used easy off, a couple of app, the old stinking stuff. Then sanded with 200 grit sand paper the 400 . Then polished on buffing wheel with polish bars from a shop that polishes wheels and all sorts of stuff. Did this on my grill,headlight bezels.
Moe
OSPHO made by SKYBRYTE CO.
I've used it for years here on Washington coast,like 6pack said well vented area. I buy it by the gallon it's cheaper.Works good for rust stains on fiberglass too,just delute it down.
Moe