You can apply the bass slap pop technique to bass scales and bass arpeggios over chord changes for all bass soloing if you desire. Slap pop is a form of bass fingerpicking because it uses the fingers to "pick" the bass strings, but its implementation is different.

Instead of normally plucking or picking of the strings using your fingers, you actually slap the strings with the thumb. This can be done on any string. The Pop comes from pulling the string with your index or middle finger or other fingers away from you creating a pop sound. Muting, Hammer-Ons and Pull-Offs are used with this technique.

You will probably find that it is a good idea to have some proficiency with this technique as well as with a pick and fingerpicking because it isn't that difficult to at least acquire a working skill with all of these even though you may prefer and perfect one technique over another.

However, more importantly than the actual technique of slap pop is the ability to apply it is a meaningful way by fully knowing bass music theory and your bass fretboard.