A great contractor that does hardwood installation in Los Angeles, Ca would be Kalley Contractors. They are highly rated.
My man installs floors. He said Mineral Spirits will remove any residue without damaging your new finish.
A plumber typically installs sinks.
A plumber installs water pipes.
There are probably a lot of companies that will install an epoxy garage floor for you. One I found was The Original Color Chips. http://www.originalcolorchips.com/services.html
plumbers
I love how bamboo looks and want too have it in my house. Is there a company that installs bamboo floor?
A plumber.
Ronald McDonald does
It is a file that installs a program.
Plug it in, it auto-installs.
The answer is: "A Plumber"
A carpet Layer.