Melamine is used for many many kitchen interiors because it's very easy to keep clean and is a night light reflective sruface to be able to find your stuff. Most cabinet interiors don't match the exterior except for the edge banding of the shelving at most. Melamine is VERY difficult to paint, and paint would be a far worse surface to store your goods on than the melamine. You would need to line it so as not to "drag" and leave marks. I'd leave things alone personally. You've got the best of both worlds now.

Label does say that, but at the SW site I downloaded the pdf sheet for the product, and it is more specific, saying "Do not use over sanding sealers containing zinc stearate". I haven't checked if the ss I have contains that stuff yet. Just curious, because some say that the ss will keep the grain raising in check...?

The interiors are maple (photo attached). The factory would paint the drawer interiors -- so I'm not so concerned with the difficulty -- I believe they spray the paint on, just like the exterior of the cabinets. I think I like how the interior of the drawers would match the interior of the cabinets, and the exteriors of both the drawers and the cabinets. But not sure if I'll regret it when I want to sell the house and the drawers show a bit of wear . . .

I can't upload photos from here, but they wouldn't be a big help because when I saw how beautiful my (special, expensive, no VOC) plywood was I said that we couldn't cover it up with laminate, so the cabinet maker found a place that could do a factory finish on it. My cabinet doors are bamboo, and the interior is maple. When I was going to do the laminate they use with the ordinary plywood and fiberboard, I didn't like the maple color. It was too pink and I thought it would look awful with my yellow bamboo. I looked everywhere for a kind of retro speckle, but most of them, like everything else nowadays, look like stone. And the colors of most of the laminates are wrong, including the boomerangs and other decor patterns. I ended up choosing a premium maple that has a texture (which I really didn't want, since the whole point of the laminate is for spongability), but it was the yellower maple that would look good with my doors. Which is a long way of saying it can be whatever looks good to you!! Choose something wild and fun, or restrained and woodlike, or in between. The standard thing to do in glass doored cabinets is to finish them like the doors. Therefore, in your top cabinets, you could have basic put on, and paint it to match. Or you could choose an accent color that will make your things look good. For instance, if your tureens and vases, or whatever you're going to put up there, are mostly white porcelain, they'll look better against a dove gray or soft green than the creamy color I believe Hush is. As for the rest of the cabinets, going with a color that matches your doors is the elegant thing to do. Or a soft accent color, such as the dove. It helps if the edges of the boxes, which show when the doors are open, are veneered to match the doors, however. You could do bright red, or do each section a different color, but matching the paint is the "right" choice. Trust your instincts. You know what you like and want.