Using a freshly sharpened chisel about 25mm wide would allow you to pear the glue from the top. The superglue is quite bristle and will chip of with a sharp flat tool. The glue will appear white until it is completely removed from the Corian, but the Corian will golfing795 white when scratched. This is why the tool/ blade you use has to be completely flat and sharp. There are also blades sold for scraping plaster or paint from glass, these are perfect for the job. Corian is fully repairable if you do scratch it. The process involves starting with a 180 gritt sander until the depth of the scratches are gone , then using 240 gritt, then 360, then 600 gritt untill the small scratches from the sad paper are gone. The problem with sanding is it is very hard to match the shine exactly so we would always sand the whole top to avoid leaving an area that may be shinier then the last polish. Corian can be polished up to a glass like finish with sand paper s around 2000 gritt, and then creams like Brasso.
Matt Cobb
January 2015