Metal pieces don't require any preparation before use, simply submerge them in the rust remover.Safe to touch and odourless.Safe to use with plastics, rubbers and painted surfaces.Better for the environment compared to acid based alternatives.Can be used multiple times before starting to lose its strength.Model No. SCS203EASY TO USE - Metal pieces don't require any preparation before use, simply submerge them in the rust remover.PH NEUTRAL - Water based formula means it is odourless and safe to touch.SAFE ON PLASTICS - Doesn't damage, plastic, rubber or painted surfaces.ENVIRONMENTALLY SAFE - Better on the environment compared to acid based alternatives.REUSABLE - Can be used multiple times before starting to lose its strength.