Yes, thanks all. The simplest response, from ixdude, probably will be what I will do: pinstriping tape over the numbers. And Mustafa, your filing is appropriate if the marks are deep and leave sharp borders. Paul's 'epoxy filler' is probably the best but the most complex.
When you are able to buy an SRT 201 with 1.7/50 Rokkor MD, 2.8/28 Rokkor MD, and JC Penney 80-200, all in near mint condition except for the pervasive engraving, all for USD 30 you simply buy without hesitation. - David Lyga
Sometimes you can buy top plates and bottom plates and just replace them. Someone doing Minolta repairs might have what you need or buy a parts camera.
Oh, I have parts, but the problem is that the existing top and bottom are so pristine (otherwise) that any replacement would be a demotion! Life can truly be frustrating. - David Lyga
I bought a MD2 + MB1 for my F2 from KEH, marked down to $100 as it was engraved !! I took a chance and ordered it......
It turned out that the Engraved item was the MB1 :) I had a parts one in my BGN box that was missing a door, swaped the door from the engraved one.
You can get lucky some times.
I have bought a a number of engraved items over the years as the price was right (Govenment Auctions), the best way is to find a Broken Junk camera with a clean base or top plate and do a swap,
I have managed to fill in engravings, using black paint and business card but the results have been always so-so.
Stay away from Rare cameras that are engraved as it is very hard to find a donor camera.
One benefit of a camera that has someone else's Social Security or Social Insurance number engraved upon it is you can easily identify it as yours without having to disclose your own number!
You just have to remember the number engraved.