I choose "Now is the time to pay the caps", after painting it green, he answers heres you reward and a little bonus for choosing green and pays 300 caps. 16:14, February 2, 2016 (UTC)
I did encounter the bug where I could not proceed in the quest due to Abbot not talking to me. I happened to pick up a miscellaneous objective to "find a stash of caps in hardware town" later in the game (not sure where I did pick it up, I just happen to notice it in the miscellaneous section at some time). After finding the stash I was finally able to speak to Abbot and complete painting the town.
220.127.116.11 21:43, July 16, 2016 (UTC)
I know you can't use blood paint, but has anyone tried the red paint you can find in Far Harbor yet? --18.104.22.168 15:37, July 29, 2016 (UTC)
The Bug where you cannot speak to Abbot after obtaining the paint might also be due to an open radiant Treasure Hunt quest that is located at Hardware Town. Happened to me on PC. After finishing the Treasure Hunt I could speak to Abbot and finish the quest without problems. 22.214.171.124 07:33, July 28, 2017 (UTC)