3-4K isn't too bad as long as:
1. ALL trim panels, rubber weatherstrips, basically anything removable should be removed. NO MASKING TAPE!
2. The paint gets stripped as much as possible.
3. Multiple layers of poly (clear-coat) are sprayed.
4. The car is then wet sended, buffed, polished, waxed, and
washed before you pick it up.
I prefer spraying PPG paint. In my opinion PPG's products are the best.