Surface preparation are essential before working on detailing work. VSS SP-10 High Definition Pre-Wash (Before Shampoo) is professional series concentrate (1:20) pre-wash cleaning fluid for vehicles exterior cleaning and surface preparation before detailing work. VSS ® SP-10 High Definition Pre-Wash helps to soften, lift up and remove harmful traffic film (e.g. particles mud and soil), micro-particles dirt, contamination (e.g. insects, bird drops and tree saps) and pollutant (e.g. acid rain and exhaust emission) where accumulated and hardened on the vehicles exterior surface. VSS ® SP-10 High Definition Pre-Wash works brilliantly to prevent swirl-mark and scratches problem.