Hey Eddy: You have seen my clunker paint job. I agree with your assessment.
but. On a budget and living on a fixed income in a tiny one bedroom house built in 1935 on a dirt road (PCH) I can tell you that you can beat the 4 dige numbers but you have to be prepared to live with persnickety examinations at your local Cars and Coffee etc.
I built my booth in my carport with 8 dollars worth of HFT plastic and a few 2x4's to secure the booth from blowing away in the afternoon gusts....
I then purchased a disposable top load gun, a gallon of acetone, mixing cups and a few 914-event tee's cut into 6" squares. In my case, I took off the doors and the lids. Then prepped the jambs and other hidden things.
Prep is everything in any half decent paint job.
If you have a good rust free car, take it to bare metal with twenty dollars worth of sanding disks (or in my case bead blast) then have the door dings and others rolled out w/o any filler or mud. If rust issue show up fix them while it is easy.
Spend good money on a good two part epoxy primer.
After that I mixed and applied epoxy primer then sprayed a float coat to find the little imperfections here and there.
Sand to level and get ready for the pucker phase.
Do not have a beer or joint here.
This is the phase of beating-the-5k-norm-cost is beat.
I mixed up two stage paint in several batches. Have many plastic cups from the paint store ready to mix properly and efficiently.
On trunk and hood, spray flat on sawhorses. If your lovely earning Wife is away from the home, use the living room or study for curing of parts in the primer stage... and the paint stage after.
On the car prep, cheesecloth all dust away and make sure now wind storms are imminent. In my case, they showed up.
Anyway.
So clean guns and mixing pots / spray and set the part aside for the next panel. Then on to clear coat. Same thing. Clean gun and mixing cups and mix ratio is everything in success.
Once all is together, assemble everything and call in the critics.. They are everywhere.
In my case, my lovely Wife wanted a red 914 / .......verses gold..... It is red... and I saved 6K to invest in the 6 build and future paint job... . The 914 shows up at our drives with a half decent paint job and 5K in the wallet for another day.. The engine bay and body are banked on not spending money on eyeliner before the beauty pageant.
I am focused on mechanical workings of the 6 conversion. Excellent Paint can wait my rattle can will do for now and base primer is good to go with any system.