Hard to say without a picture, but sounds like you could just sand down the spot that's already epoxied. Don't have anything against Solarez but don't use it--not that much more work to mix up and use the same stuff your board is made of.
As far as what looks like paint chips, my first test is just to press my lips around the spot and suck in. If nothing happens, it's good. If I taste resin/foam, then it needs a patch--if I taste saltwater, then I might have to look at a more extensive repair.
Even if it might require more of a repair, with small stuff I put a sticker over it and go paddle. I usually don't fix every little ding right when it happens but wait until I have a bunch of them. Google "Puka Patch" and get some. Great little things that keep you from cutting short or missing a session.