We do a lot of acrylic stair treads and usually flame the edges with mapp gas. works great, but there's a lot of prep work needed to get a perfect finish. And we do go for perfect. No bubbles, burned in fingerprints, dust specks melted in, that kind of thing, that ghosty haze that happens sometimes. A guy told me his old shop never flamed and used buffing wheels on a bench grinder. The stacked up fabric wheels and some really fine polishing compound. I had never heard of this. Anyone use a method other than a torch to polish edges?