Do you patch holes and match texture? Where do you source supplies? And what paint goes over existing oil or latex — are all paints equal on VOCs?
Yes — I patch holes and match most textures (though sometimes I look at an old texture and think, "how the heck did they do that?"). I source my supplies locally from Stockton Paint downtown, which is locally owned and operated.
The biggest mistake I see is people putting latex over oil-based stains and paint. Water-based paint won't stick to it — you have to prime with an oil-based (or bonding) primer first. I usually see this on exterior substrates and stained garage doors.
On VOCs: lacquer, oil, and two-part catalyzed paints are the worst. A lot of the water-based stuff is low-VOC, and both Sherwin-Williams and Benjamin Moore make no-VOC lines. Even so, if you're painting indoors, wear a mask or have good ventilation.
Related: drywall & hole repair · exterior painting