This is amazing.
In FIVE responses, just about everything is covered.
The only aspects would like to add:
Time and Patience——Don’t cut any corners. You’ll regret that
A proper place/Booth. As long as you have a decent garage, you can build a good temporary paint booth without too much difficulty or crazy amount of money.
In the end, you may not end up with a “House of Kolors”, $15k, show winning paint job, but you will be able to say “I painted it myself” , and for me that makes it all worth it.