A logo is painted on a logo or otherwise cannot easily be removed from a product
Instead of sewing the logo onto the product, or sticking it on as a logo, the logo is printed or painted onto the product.
Of course, everyone should try to remove the logos first. If that doesn't work, then covering them is a good option. If that doesn't work, keeping them out of sight as much as possible.
Using the tools from the toolbox, cover the offending logo.
A black marker is good for covering logos. Adhesive stickers can also be used, though they tend to look ugly and fall off. And of course there is always electrical tape.
No special skills.
This one is a mixed bag - on one hand, you don't have to look at the logos, but they are still there, and that may eat away at you a little. It's better to own stuff that doesn't have a logo on it in the first place, or to get stuff where the logos are easily removable.