Star 10 Phase 2 Liquid is a specially designed product that acts as a "wash" to Star 10 Phase 1 Paste. All of the left over bits of paint and residue that didn't get stripped off the first time are simply wiped away when using the Star 10 Phase 2 Liquid stripper. It is what makes are system as close to perfect as possible. AND its' polishing qualities are not limited to only paint stripping. It removes an array of residues, with the same eco friendly spirit, and acts as a great polisher of metals. Simply spray it on and wipe it off leaving only the original clean surface shine.