listen to these two videos. Listen to the play thru first, then listen to the Bass ONLY.
There are slides, clanks and all sorts of noise that goes un noticed in the mix, but when listened to alone, it has it all.
However, if the bass were not played with this type of grit, the mix would sound weak IMO.
I use this as an example because I have used this to learn the song (even tho I know some of the main slide riff part is incorrect, most of the “FUN” part of it is legit), and the first time I recorded myself, I was disappointed with all the noise I was hearing that I thought was my poor playing. When I went back and JUST LISTENED to the Bass ONLY version, I was hearing all the same things that you hear here, so I started to feel much better about my playing.
Also, it is not ONLY the slide parts of this song that you hear the finger scratches in.