There is no ‘erase’ that can be done, because the sound is co-existant with the rest of the sounds on the track, which would leave and audible hole.
RX’s spectral editor is fantastic for this type of thing.
When I have mis-hit strings, I usually just found the same note elsewhere, and cut-and-pasted it in RX, which automatically cross-blends the start and end for seamless insert. Sometimes I had to stretch or shrink the note to have it fit.
Once, I couldn’t find a replacement note, so had to use RX to kill the wood-hit doubled leading edge, then highlight each harmonic and increase their level and length. It took a little while but it is indistinguishable from a normal note. The spectral editor made that possible.
If doing recording, especially with condenser mics, which pick up every extraneous noise possible, RX is indispensable. The sound editor on both Lord of the Rings (LotR) and The Hobbit (TH) said that with LotR, they had to throw away 80% of the onsite recorded audio because of the noises, but on TH, using RX, they kept over 85% of the onsite recordings, even with the 48Hz cameras which generated a lot of noise in the 3KHz band. That is 100s of hours of rerecording and overdubbing that didn’t have to be done.
RX’s spectral editor really comes into its own with a 48-50 4K TV/monitor, as it saves a lot of panning and zooming.