Make sure to wet the product before use. May scratch plastic or lustrous stainless steel. Test on an inconspicuous area before using on easily scratched items, such as soft plastic, or lustrous stainless steel bathtubs. Do not use the product if it has hard dust or sand stuck to it.Test it first in an inconspicuous place.Keep away from fire and other sources of heat.Do not use this product for purposes other than its intended purposes.