The best detail shop..
http://www.drivenperfection.com
Go ahead and try the "m&m trick".. they will find it..
The car wash I frequent is on rt 99 in Somerville/Everett (not sure of the name but you can't miss it).. I use the self wash bays.. They have everything there including 2 touchless bays but I've never used them..
--mike