I have an older American Standard toilet(3.5gallon) that has developed some hairline cracks in the bowl. If you run your finger over them, you can't even feel them. But I'm afraid this may be a sign this toilet has had it and needs to be replaced. But I don't want to part with my 3.5 gallon flush. Any suggestions? Can I repair the bowl with some sort of porceline stuf that you can repair tubs with? Or can I get a new bowl to go with my old tank? Looking forward to an answer. Thanks, Marty