Hello: We are having new siding put up on only 3 sides of house. Will have to match the paint color for the painting of the new siding against what is presently on the side that is not to be re-sided. Will use a piece of the old siding as a color match which, I'm told, they can do very accurately at the paint stores using a "photometric" device. How true is this; a "real good" match to be expected ? What I'm also interested in before I have any painters over is the following: I'm assuming that at the paint store they (can) only mix up the colors for 1 gal cans at a time with the correct pigment (on the basis of the photometer). So, how does one insure that all the cans they do this way are really identical ? It's hard to believe that if each can is done individually, there are not slight differences in shade, etc., no matter how accurately the pigments are dispensed. Can they do, e.g., a larger volume than 1 gal (at a time) ? Or, does one insist that the painter mix in a large jug at least 5 gallons or so, so that at least each side of the house is identical and uniform ? How is this "problem" usually handled, please ? Thanks, Bob

I need to touch up a small area (2 ft by 2 ft). I know the left over paint will not match exactly. Neither will new paint. Does anyone know if a 7-year-old white paint will change color a lot (like turning to yellow)? The left over was off white flat by Benjamin Moore. Thanks.