Technically speaking, shops are also supposed to actually remove stickers to visually inspect tanks too. I have hardly ever seen a shop actually remove stickers. I got a tank hydroed just last week and put a duct tape strip on it with my name, what I wanted done (hydro, vip, fill) and the date I left it. That tape was still on in the same spot when I got the tank back. Neither the shop nor the hydro facility saw fit, apparently, to follow their "standards" and remove the sticker to check for corrosion.
Makes me want to buy a very pitted tank and put a sticker over the pits. Get it vipped, then in the store remove the sticker for them to see what they just let me get away with.
Also, I have seen some airbrushed tanks and the only word that came to mind was "stroke" and it come to mind very quickly and with other adjectives too
And they weren't nice adjectives
Get a silver tank. End of story.