Bob.
You likely would not run across these products outside of the commercial auto detailing sector. The Orange Crush (and another product called HD Clean) are sold in 45 gallon plastic barrels. The Remove All and an equivalent called Safe Solve are sold in chubby ten-gallon white plastic jerry cans equipped with a bung that you pop out and screw a plastic spigot into.
The Orange Crush and HD Clean can be sprayed onto a flat surface and a toothbrush used to loosen up grime quite easily. A quick wipe off is recommended, however, only because one is dealing with 75-year-old paints and varnishes. The Remove All and Safe Solve are a bit more aggressive if you are not careful. For those I spray onto a cloth and then gently rub the more resistant marks to remove them. Great for tars, grease and reasonably fresh paint overspray, but again, I would not trust them to sit on old varnish and enamel paint. They both will lift the surface of the paint if you are not careful.
For polishing, I found a product years ago at Princess Auto called ‘Dursol’ It was a pale pinkish cream in a tube and I applied it with my finger tip as you can really tell when it dries and needs wiping off that way. This product is still made but now called ‘Autosol’ and Canadian Tire carries it. Photo attached. I found it polishes down yellowed varnish nicely. You have to be patient, however. I usually work in two-inch square areas at a time, slowly lightening the varnish until I get the shade I am looking for. Then I start an adjacent area and match the result to the first part done. It is a slow process, but worth it in the end I think. One word of advise. Good lighting is mandatory for this work. Shadow free if possible and always the same lighting each time you are working on the project.
I played with the upper left hand corner of the Sender panel last night, photo attached. Basically the area down to the bottom of the fan door and to the right, just covering the ‘Canada Decal’. Not really an attempt at obtaining a desired end product. More to just get rid of the ugly, hand painted, red ‘R22’ visible in the first Photo of Post 201. It was bugging my gizzard! This was done with the two previously mentioned liquid cleaners, with just a bit of Autosol brought into play at the very bottom of the fan door where a couple of runs of red paint had accumulated. You will see the grime along the top left corer of the frame cleaned up rather well. Note the untouched upper right corner to compare. Also, I was surprised how well the angle bracket on the left edge of the panel by the door cleaned up. See its grime covered partner on the right side for comparison.
One interesting discovery. Take a look at the Power Selector Switch directly above the High Power Lock at the lower right. It is the same switch as was used on the Canadian Wireless Set No. 19 Supply Unit Mk II.
David
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