[Joeztech]

The condition of the top of the chassis reminds me of the 40-201 chassis I restored recently. If the corrosion is not too deep you may be able to clean if up using a step process. I started with GoJo and a fine stainless steel wire brush because the corrosion on my set was so deep in places. Be careful of the tube sockets as wire brushes can scratch the surface of the bakelite plastic. Regular GoJo without any abrasive in it might be good as a starting point with a toothbrush with fine bristles. Mask off any trimmer capacitors underneath to keep cleaning compounds from getting into them. After a certain stage of cleaning I resorted to using some naval jelly to help clean out some pitted areas on top of the chassis. There are some alternate ways of dealing with the corrosion so look through other posts on this topic.

Joe