would just putting a little wood fill/super glue fill and then sanding plus spray painting to blend, work at all ?
You could do that if you just want to do some patch work. If you go that route, as RGT said don't expect the best results. A quick touch up of paint and a little varnish should be good enough to prodect the wood and look alright from a few feet away.
If you want a nice looking repair that hardly noticable it's a little more involved. You'll have to fix up any wood chips, do the paint touch up then fill in with layers of clear. The wood repair, painting, and clearcoat isn't a big deal to apply. The hard part is blending everthing so it looks right. It's not impossible but is rather difficult to blend properly especially when working with 2 different finishes. Most home repais usually stick out like a sore thumb (usually because it's done as a patch and not a full repair). I don't want to discourage you from attempting a repair I just don't want you to go in with the wrong expectations if you do try to repair it.
If you do go for a repair here's the process. First mask off the area you'll be working on so you don't accidentally damage anything else while working. If you have wood chips you'll need to sand it smooth to blend it. If it's a deep chip you can fill it with some wood putty then sand everything flush. If it's too big of a chunk you may need to cut that area out and splice in a new piece of wood. From you pics it looks like a quick sand will do the trick. After you get any wood repairs done you can move on to touching up with paint. You can pretty much use any type of paint you have available
just make sure the color matches. After the paint is good & dry get yourself some cyanoacrylate (super glue) and start building layers. Do your best to not get the super glue everywhere (easier said than done sometimes). Once you get your layers built up start scraping and sanding it flush. You'll probably have to go back and forth a little from filling to scraping & sanding back to filling then more scraping & sanding. The goal here is is to get the repair area flush with the old finish. Once you have everything flush & level move on to buffing and polishing. Start out by wetsanding (water with 1 drop of dishsoap) with 320-400 grit sandpaper. Then wetsand moving through progressivelly higher grits; 600 - 800 - 1200 - 1500 - 2000 grit. What you're doing here is first removing any initial marks with the lower grit paper. As you move through the higher grits you are wanting to remove the scratch marks from the lower grit you just used. By the time you get to the 2000 grit you should be working with just some light swirl marks and a slightly dull finish. You can go higher than 2000 grit if you feel you need to. *** Here is where you need to make a decesion based on the look of the rest of the body. Does the wear and tear on the rest of the body match up with your repair? If it does you can stop here. If the repair is noticably duller than the rest of the body then move on to polishing compounds. Get a clean cotton cloth and some fine cut polishing compound. I like the 3M brand but any will do. After buffing you will be left with very light swirl marks. Again compare the repair area to the rest of the body. Does it match well or should it be polished a little more? If you need to polish a little more hit the repairs with some swirl remover. If you have taken your time and done everything well, at this point you should have a repair that blends seamlessly with the rest of the guitar and should be pretty unnoticable.
That's pretty much the whole process. Now keep in mind on paper it doesn't seem to be too difficult. The difficulty really comes from having the patience and steady hand to get the blending of everything just right so it's unnoticable. Also don't expect to blaze through this in an afternoon, it's going to be pretty time consuming. Expect to spend a good couple of days or more on it.