This is an acid based cleaner that will remove brake dust, tar, grime, rust, etc. You can dilute this product as much as you need to. The wheel should be cool and sprayed with water first, then spray on our wire wheel cleaner and let it soak for 30 seconds to one minute, then spray it off the wheel completely. If the wheel is not clean enough, repeat these steps until the desired results are achieved. NEVER APPLY THIS PRODUCT WITH YOUR HANDS, OR RUB WITH A RAG. The acid will burn the skin. Always use rubber gloves and eye protection when using the product and let the product do the work, the user does not need to scrub, this product will do the cleaning. DO NOT LEAVE THIS PRODUCT ON THE SURFACE LONGER THAN ONE MINUTE. This product can stain polished wheels if not used properly.