I make my Iso tincture by 1st chopping stems and twigs as fine as I can.
I put them in a gallon contaciner with 91% Iso, and leave in the sun for a day.
I drain, and then I add weed, trim and budt (all ground) to the mix...
I heat thjis in the sun also, but in a black back, to eliminate light and attract more heat.
I leave this in suspension for a few days, and heat as much as I can, and shake.
I strain, and bottle.
For some people I add menthol crystals..
for some oil of wintergreen...
or I leave as is.
You do not massage it in... but rather get a cotton swab, and paint it on liberally... and each time it evaporates on the skin (fast) paint another coat.
Very effective.