"Sharpie Paint Markers- Water or Oil?" Topic

After multiple attempts to brush paint symbols on my 10mm flags, I'm abandoning the brush for a paint pen. Sharpie seems to be a reliable brand (I tried Craftsmart, and it wasn't worth a $#@%.)

I'm wanting a nice white that will work on black paint (acrylic), with a decent thin line. Looking around, I'm finding both oil-based and water-based versions.

Anyone have recommendations or experience with these pens?

I've used Micron 05, #1 Archival Ink pens to some success. Also, Uni-ball "Signo" white pens.
With all of these pens, the useful life is short. Sometimes less than a month. I usually buy one when I need it then toss it. I use them for 28mm scale troops' musket straps, belts, backpack straps etc. For British infantry I like to use white pencils. I sharpen pencils on both ends in my desperate attempt to stay ahead of the 'sharp curve'.
Also, the white tends to 'bleed' unless you make a quick pass.

White pencil! *facepalm*
BRILLIANT!
Just pulled one out of an old pack of colored pencils. For orc-workmanship banners and shields (slap-dab painting, basically), it's perfect.
I wouldn't use it for much else— grainy, resembling chalk on slate— but for a bunch of brutal, who-cares-what-it-looks-like minions of an insane traitorous wizard, it's exactly the look I want (even resembles the look in the films).

Thanks for the suggestion!

Light grey chalk pencils are great for highlighting, too.

Done! Banners and shield symbols look awful— in a perfectly slapdash orcish way.
"Boss says we gotta paint this on the shields."
"What's that?"
"Some sort of rune."
"A ruin?"
"No, a rune. Like a letter, or sommat."
"A letter? Like you gets in the post?"
"No, like in an Alfeebet— wait, since when has you ever get anything in the post?"
"Since when does the post deliver here?"
"I dunno. Why'd you bring it up?"
"I didn't. You was the one goin' on ‘bout letters."
" !!! … just shut up and paint this on the shields."
"Like that?"
"Uh… close enough."

And so on…