I want to paint a few small spots here and there on interior walls - not repaint the entire room (a hefty size repaint, and most of room looks fine). Cleaning of wall isn't an option, as in some cases, there have been specs of paint chipped away for one reason or another when kids were younger (not general wear + tear). The problem - I don't know the exact paint color or paint manufacturer/retailer of original wall paint. Are there places (whether Lowes/HDepot or specialty like Porter, etc) that can replicate color ? What would I need to supply them to produce a pint of replicant color paint ? How precise can I expect their results ? Thanks for any help/guidance.