40 minutes.
make sure no child or your house pet can reach plastic bag during this period.
open window(s) and let new fresh air in the room, however, don't allow the room temperature drop too much.
remove the steel sheet from the plastic bag.
make sure you still have the disposable board below your steel sheet as now it gets a bit messy.
proceed carefully and with patience. you might damage the scraper or the steel sheet.
get a plastic scraper and start peeling the glue from one corner.
try concentrating the glue in one place, it will be easier to remove it as one piece.
sheet looks almost clean, but we need to make sure all the 