before you even start sanding, tape everything off. Lay twice as much tape around the area's to be sanded. Sand with atleast 400. You don't want to have to spend an ass load of time sanding. If you start with an 80 grit you will have to work up to the 400 grit in grades. If I had to get my hood re cleared, I would find someone with a booth and pay for it. Your hood needs to be done right. You can probably do the tops of your fendrs yourself, especially if you can follow the lines of the car. You are going to have do a bit larger area than you can just see to help all of it to blend. I would only spray paint the hood with a clear if I thought honestly I could pull it off. I have seen people do this. Some of them look like ass and some aren't to bad. You can probably get any body shop to do your hood for clost, and this is a guess, for 250$. Thr bottom driver side of my rear bumper had paint flaking off of it, I touched it all up after scuffing with scotchbrite with spray paint. My ride is white. Nothing really shows up until you are right up on it. Black is known for being one of the more noticable for blemishes. You have nothing to loose by trying it and seeing iff you don't end up kicking yourself for doing it. If you are just black/ straight black / no metallic or anything I wouldn't worry about making the paint match. Black is usually always black. Kinda like white has shades, but you can always find a krylon in white that'll do the trick. Go from front to back with your paint stroke. Not side to side or it'll be extremely noticable. Hope this helps.