What? I'm confused by your post. What do you mean when you say 3-4 corrections on your hood> I think paint elsewhere is good? If you're talking about using a rotary polisher or one of those drill attachments then yes, proper technique is key to getting good results, it can be done, you just have to me more careful. Watch some you tube videos on how to properly use a rotary polisher and you should be ok. I started out using a rotary polisher, it's just DA's are just as fast and much safer so I can work with them and get more done with out the risk.
https://www.autogeek.net/buffer-polisher.html
The key to a good finish with the rotary style machines is the correct pad. A heavy cutting pad will remove the scratches and defects very quickly but will leave holograms, if you finish with a light polish and a lighter pad you can remove those holograms very easily. A DA doesn't leave them in the first place so you can often avoid the second step.
If you get one of those drill attachments start out with the lightest cutting pad and lightest polish you have and work your up until you get the removal you are after, then work your way back down to finish it. Meguiar's Ultimate compound and polish would be great choices for this.