We are in the process of sanding away the botched paint job. It is very difficult because this paint is very very hard. It will take 5 days power sanding to finish.
Here is a picture showing the bad job. I spray painted black over the top, then I partially sanded it to make the imperfections visible.
I have three theories of what went wrong, and no good way to verify which it is.
- We did not spread the paint thin enough. Countering that, the can says coverage 100 square feet. I spread it 150 square feet. On the recommendation of Jamestown distributors, I bought 6 750 ml cans of paint to complete two coats. We used only 2 cans on the first coat not 3. Still it seems too thick.
- We moved too fast. We did the whole 300 square feet in one 4 hour period, 7-11AM when the temperatures were within the allowable range. That means a lot of moving ladders, and little time to revisit painted places and tip and re-tip 10, 20, 30, 40 minutes later.
- When tipping with the brush, we might have been too generous with paint thinner on the brush. It would be running dripping thinner, not paint that ruined the job.