So heres my e36 project I have been working on for the past year. bought not running damaged panels, etc etc. Fixed the car, got new panels from donor cars and right now currently whats left is exterior looks.

I have been hunting around for someone who can cheaply paint the car and btw not looking for an awesome paintjob. And all I have found were prices higher than I paid for the car FOR a crappy finish (Told them Im not looking for a good paintjob just want the car being 1 color) also macco where I live is expensive if you plan on telling me to go there.

I have no paintbooth or clean garage to paint the car in myself but I still want to see if I can tackle the job, also maybe learn from it since im open to seeing what mistakes I make. I started sanding the car down and want to spend a good amount of time getting the car prepped perfectly since it's more of a time consuming subject other than having a good paint booth and paint gun. 

I want to buy a harbor freight paint gun and try to spray each panel alone first and see how it comes out but my question is, if I do a semi-bad paintjob will it be somewhat saveable with wetsanding and polishing. Also still not expecting a mercedes paint finish just want it to look good from 4 feet away. 

Can you fix a bad paintjob with a lot of wetsanding and compound?