Conversation so far:
When did Kennedy start working with Slash?
In late 2009.
What project were they working on together?
it was reported that they would be working together on Slash's self-titled debut solo album.
What was the name of the album?
self-titled debut solo album.
Was the album a hit?
CANNOTANSWER.
Are there any other interesting aspects about this article?
On February 3, 2010, Slash announced that Kennedy would be the lead vocalist for his band on tour.
Where did they go on tour?
CANNOTANSWER.
What happened in 2009?
they would be working together on Slash's self-titled debut solo album.

Question: When did they finish the album?
Self-contained rewrite: When did Slash and Kennedy finish the solo album?