Concentration of StarSan to remove Paint from Bottles?

I've heard on here several times that StarSan can remove paint from bottles (such as rogue bottles).

What concentration does the StarSan have to be for this to work? I know it doesnt work at the usual concentration used for daily sanitation.

TIA

i had a 2 month old batch of StarSan that I used (regular strength) and it was taking the paint off my Stone bottles pretty good (tested with 2 bottles to make sure it would work).

I dumped that into a bigger container though, added a few more gallons of water and tossed in another dose of StarSan, so at that point it was probably 1.5 to 1.75x the normal amount. Worked out great for me. I had a harder time with the Rogue bottles compared to Stone bottles.

thanks guys, i will have to give this a shot