You'll find that even using a guide, you're increasing the bevel. Gradually that stone in the guide won't be touching the base edge, even using non-flexing ceramic and Arkansas stones. It'll only clip off part of the burr from tuning. Now, does the average tuner stop hitting the edge when that happens? I'm guessing they'll still feel the remains of the burr and hit it some more. Maybe using the gummy, maybe bearing down a bit on the stone. But it's time for a stone grind when all your stone is affecting is the air. Some won't care if the bevel has become a 2 as soon as others will. But your bite on ice will require that much more effort. And it'll be back to the shop to remove ptex or you'll be going through Jacques's long bevel and then a flatten process. I've managed to avoid having the shop touch them for a while, but, they're due. Not for base flatness, not for structure, but because of base beveling. It's been a few years, I've been careful, but.. That bevel has increased. That's why you'll hear some here asking for a .7 on the base. So they can put off the inevitable longer. (Then of course you have to track down a .7° guide...)
So, leave the base edge alone except to get the "outies". Certainly there will be polished "innies". Leave them alone on the base.
