Thanks for input Artemus and one thing is certain,
your approach is correct as long as you get results from it
and keep your playing clean and accurate
As for me, when I sweep up on the neck I like to
apply same muting techniques as if my picking hand was on the bridge
which means regular muting with palm and of course left hand muting.
Now,muting with the palm around 18th fret isn't really the same
palm muting like palm muting on the bridge
and it surely doesn't work in
real time for playing muted
power chords or stacatto arpeggios per example,
if you apply muting on every note that you're playing
string will touch the fretboard and you'll get nothing but more noise.
It's actually more like "after effect" so you need to mute string
after you're done playing on it, and it works mostly for lower strings
just like palm muting on the bridge.
You have to be very careful when doing it tho,
it's just slight touch on the strings without any actual pressure.
In Sweeping and Tapping lesson we start from A string on each shape/arpeggio.
So you have to play A string without any palm muting
and once you start sweeping on D,G strings etc you apply palm
on A string, then D string etc, you mute those strings that you already played.
Left hand finger moves are essential here as well,
everything has to be done very precisely without moving fingers too heavily
in order to avoid extra string ringing.
All this maybe sounds scary atm but after enough practicing
your hands will get the "feel" of what to do,
like basic instincts or som.
Let me know if I missed something.