Pens For Signage.

Hi All,
As I've most likely told you in the Past, I Sign most everything I make.
Well today I was in Aldi, & the School stuff is out. Hunted around, low & behold a packet of 4 Black x 0.4 Felt Tipped Pens by Scholar / Fineliner.
Wait for it, $1.29.
Bit hard to find the Black, but they had Red & Blue
I normally buy Artline 200's 4 for $10.
Haven't give them the full work out, but they fit the goods.
I haven't found anything in the Polish line to remove the Artline Ink from my work. Pkt. says Water Based Ink, well your not going to put water on your work are you ?.
Hoping these are the same. Probably gone by Sat. 17th.