I bought a high quality (high power) 70s receiver about 20 years ago. I am still using it. When I got it, the whole thing was covered front and back with whatever cigarette smoke puts on things. It was thick and oily. I used some cleaner that I don't remember. But, the point is that this receivers front face and wood cabinet were in pristine condition after cleaning. I believe the cigarette smoke preserves surfaces. So, if you see a second hand piece of gear somewhere covered with this cigarette goop, snap it up. It is always easy to repair the circuit, but much more difficult to repair the outside surfaces that show. I don't recommend smoking to preserve your own gear. I think your lungs have a greater priority.?
