I am helping out a friend who owns around 20 websites and between May and August 2009 they were all handed a -50 penalty.
I think most of the problems has been that he was interlinking all the sites.
Now, can we fix one site (ie, remove everything that's been done wrong) and submit it for reconsideration or do we need to fix ALL of the sites at the same time and then submit the requests?
Does Google consider other sites you own when reviewing a reconsideration request?
We would ideally like to get one ranking properly again and with that knowledge apply the same fixes to the other sites. It is a massive job as it is thousands of flat html pages so we would like to do it one site at a time.
Thanks for your responses.