Recieved my eagle 1 wheel cleaner today. Its appearance is yellowish and pretty thick. Dilutable to 1:3 . im pretty sure its acid based ( contents are Hydroxacetic acid, oxalic acid , butoxyethanol ) so i kept my distance from any contact / spray. Diluted 1:1 sprayed on a dry cool wheel let sit for 30 secs than hosed off. Just as effective as A2Z. However im prettey sure a2z is not acid based but i could be wrong. I will recomend this to anyone with factory clear coated wheels as long as you follow the directions you shouldnt get any etching. :up