different mechanic using different alignment system... the current mechanic can say that previous different alignment system screw up the settings or the mechanic screw up the VIP screws/nuts & damaged... as simple the warranty void once opened engine valve cover, they can said previous mechanic screw up the engine...

but usually mechanic will do some paints on some major screws?
if found that paint chip off or cracked or mis-align, means someone touched...

no necessary must black and white for warranty lo...
otherwise the LYN garage sales no required for personal warranty for the used items, a lot of forumer provided 3 days - 1 weeks personal warranty... the warranty is provide to convince customer to buy items/service from them to prove that their items was fully functional and they experience enough to service their car...

This post has been edited by gkl83: Feb 16 2009, 01:28 PM