I'd like to know from any experienced rehabbers who've dealt with this and what are some products that are effective at removing carbon and soot from brick.

Feel free to PM me for real estate agent, plumber, and house inspector recommendations.I would also highly recommend searching for "house hack" and navigating to the BiggerPockets Blog section for a great series of articles on doing exactly what it sounds like you're thinking of doing.Finally, connect with @Troy Fisher, and @Kevin Carbon as they run the local in-person meet-ups that are great (free!)

and thanks @Kevin Carbon for the shout out :) I have a few people who would love to connect with you guys.  

@Andrew Buchan  why log cabins.. are you trying to store carbon for the planet ..

@Kevin Carbon thanks for the shout out!

If you are looking for a recommendation, feel free to PM me, or contact any of the others who have already chimed in.Given some of the investing strategies and his line of work, I would see about contacting @Brian Fouts offline, solid guy to talk to and good at breaking down various strategies.You should also look to attend one of the upcoming Meet-Ups, @Kevin Carbon and @Troy Fisher run them with their business partner Tiffany Plovie.

@Kevin Carbon, @Troy Fisher, and @Tiffany Plovie run the local meets, hope to see you there!

@Troy Fisher, @Tiffany Plovie, @Kevin Carbon run the local meet-ups for the Eastside, Seattle, and Tacoma-Lakewood respectively.Since you've already started to focus in on rental properties in the Puget Sound region, I would recommend you start looking into budgeting.

Connect with @Kevin Carbon and @Troy Fisher.

Linoxyn (solidified linseed oil) and rosin are the stock to which fillers such as cork dust, wood flour and calcium carbonate are added.