Yes it can be hand washed without any problems. You cannot however use any abrasive chemicals, power buffer or clay bar on this stuff. If the vehicle is consistently cleaned and it is not exposed to direct sun light every day then the wrap can last 3-4 years. 3M specs for this material states 3 years outdoor life expectancy for vertical installs (car sides, bumper, etc) and 1 year for horizontal installs (hood, roof, trunk).Can it be washed? How does that work? Go long does the vinyl last?