Step #1 peel off the badge / purchase the badge from wherever (there's a lot of retailers for these on ebay)
Step #2 flip it upside down to expose the underside
Step #3 get an x-acto knife and scrape away the coating until it's completely transparent:

It'll look like this when you turn it the other way around:

Step #4 get some black paint (I would recommend rustoleum universal satin black) and spray paint over the underside of the clear area to fill it up
Note: when painting over the transparent area I would HIGHLY recommend you tape the clearplate to some paper so that the spray paint doesn't get on the front face, and don't forget to cover up the LED windows too. If it does / immediately wipe with isopropyl alcohol.
And here is the end result:

Looks like it was made that way
Because the plastic is frosted, it's virtually impossible for any imperfections to come through.
For the pure minimalist, you could remove the ThinkPad model number too; or take it a step further and remove everything.





