i doubt that a liquid in a can can restore cylinder walls but it doesn't hurt to throw it in there. Your valve stem seals are probably worn and letting oil drip down into the cylinders.

On start up, you'll get a puff of smoke and then everything will be fine. You can drive it for ages like that. Just watch the oil level. Replacing the valve stem seals can be done with the heads in place so it's not that expensive.

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With best regards

Al