^^ you cant mix krink on montana markers stupid, that shit'll make your nibs dry like shit. Montana markers carry 1 of the easiest inks to buff, their water based man. they are refillable but even though i dont like OTR markers eather, i'd still choose flowpens over montanas. but the montana 30mm is fucken as shit.
Montana markers are OKAY, I find the paint flowage to be alot better then the otr perminent paint markers..
Between paint, Montana and OTR are almost identical. It's justa matter of preference. Ink, however, nothing beats an OTR, unless you made a sick homemade, and even then, OTRs are smooth.
montana markers and otr markers (so are molotow marwell and all the other crap) is like a honda civic... the body is good... doesnt look bad, function pretty well but GOD DAMN what's inside suck! you need to put something else in it because the stock engin just doesnt cut it! i mean common water based paint... the pigments are good and stuff but its a joke to buff... flowpen ink isnt fade resistant and hard to buff is easier to buff than sharpie ink... so get a marker body (the empties) a bunch of replacement nibs and try anything you get your hand on in it!
if you want montanas but dont wanna pay for em go to micheals/a.c. moore/artsy craftsy store zig postermans same bodys same waterbased ink/paint (idk which) only free/very cheap