Hi folks, I am looking to get my year and a half old car for a 3M paint sealant treatment. I see that some 3M outlets are doing steam wash instead of the foam wash 3M's are used to. Is Steam wash better than Foam wash? If yes, why? Which branch of 3M do you recommend in Chennai? I am closer to both Nungambakkam and Santhome branch. Santhome I hear is the only branch with Steam wash. Appreciate any help. Cheers.