Recently received an about 10 year old, used daily, industrial 15 gallon kettle. Doesn't sound to glamorous, but it was free from my job and is a huge upgrade in amount of boilable wort. I have scrubbed and scoured it and heat cleaned it then sanitized it. It works great, doesn't have any dents and is heavy duty. It's just ugly as all get out. Is there a way to make this shiny again? I don't want to experiment with any chemicals in fear that I could contaminate the kettle or make it worse. Any helpful tips? Or should I just be happy with my kettle and focus on the beer?