you can hand polish in an emergency.
scrape edges to remove any saw marks, sand down with a 240 grit wet and dry with plenty of soapy water, then 600 then 800 etc until you get a nice flat finish, then just t-cut it and it comes up clear.
alternatively you can buy a small hand held butane torch, electronic shops sell them I think, they give off a nice flame (but a bit too hot) and with a bit of practice you can get a reasonable finish.