New Coastal Warfare Sea Cloth

I was in the local charity shop this morning when I saw this shiny metallic blue curtain material, which looked perfect as a sea cloth for my WW2 coastal warfare games. It's a massive sheet, measuring 208'' x 56" or around 16' x 5', so I could cut it in half and have two cloths, if I can tape up the edges to stop them fraying. It matches the bases on my 1/600th scale models fairly well and does look very much like a patch of the North Sea at night time. I was thinking of spending some serious money on a custom made sea cloth but for twenty quid this will do very nicely indeed.