Sometimes you need to shave a logo that has been painted or etched on a product.
A lot of times a logo is just painted on the product. In this case a gentle filing job may be enough to get rid of the logo, especially if the product is some form of plastic or metal which won't be greatly harmed if a millimeter or so of the surface gets worn away.
Sometimes the logos are also embedded in the plastic in the form of raised lettering. In this case it's also possibile to get rid of the logo by filing away at the area around the logo.
No similar tools to compare the file with yet.
Apply file to product near the logo, move the file back and force, gently applying pressure until the logo is removed. Increase pressure until the logo begins to be removed.
Files come in a number of different sizes, and having a number of different sizes is useful. In general, I've found the smaller sizes to be more effective, since they allow the area being filed to be pinpointed more precisely. Bigger files may get the job done quicker, but they tend to leave ugly areas on the product, so it's obvious where the logo used to be.
This is a very useful tool for removing logos.
No special skills needed.
The logo is easily removed with a fairly small amount of work, so the payback is pretty good. On the downside, filng away a logo can leave an unpolished or scratched area on the product where the logo used to be, so there's a little bit of a cost there. I suspect there may be tools/methods for polishing that I don't know about yet, so this may be avoidable in the future.