yep-yep
I just polished a spot and had them use their little camera to snap a pic and hook it up to their machine and it matched it exactly.
while i was working on my k5, & it wasn't movable and i was waiting on some parts, and i had a fender to replace, i buffed my gas filler door and took it off & carried it in to my local paint store, they put it under that spectrum camera and mixed me up a qt. and then put it in spray cans for me.
i painted the inside of the fender & then the outside w/the spray cans,, before putting the fender on, once i was done working on it, we rolled it out of the shop and my fender looked like a shiny penny, i thought I'd never get it to match b/c rest of the rig was dingy, but after washing & buffing the whole truck, it matched,..everything but the hood!
i wound up getting another qt mixed and put in cans(for future reference, i kept the color code card they gave me in my truck receipt folder in my file cabinet) and i sanded all the nicks & chips out of the leading edge of the hood & primed it there, then painted the whole hood, & the cowl piece, it all matches now, i had enough left over, i even painted the horizontal colored piece in the middle of the grill where the bowtie mounts in the middle between the headlight buckets b/c it was all nicked & chipped, the hood edge & the colored stip being smoothed out & fresh painted made a noticable difference in the look of the truck and you can't tell i used spray cans at all!
any good local paint store should be able to mix your original color w/your codes, but like was mentioned, if your not painting the whole thing, the colors won't match due to fading, so if your doing just part of it, you need to find a paint supply or body shop that has 1 of those color spectrum cameras....a body shop may be more likely to have 1 b/c they get cars in that are 3, 4, or 5 yrs old and they are already fading and they have to match the faded color.