How To Make An Oil Slick
An oil slick is a way to put a barrier between the dough and the table to prevent sticking. Many bakers use flour to stop their dough sticking when hand kneading, but this causes the flour to get absorbed into the dough.
This is bad news as the bakers recipe alters without control as it now the dough includes extra flour. It also causes flour to enter the dough that has not undergone fermentation so is raw.
When baking in hot conditions the dough can get stuck everywhere. Bakers can be tempted to dust flour on the tables even more so than normal which causes the same issues.
To avoid the issue of incorporating extra flour into the dough we can use an oil slick. By this we take a small amount of olive oil and rub it on the work surface. Some tables such as a bare wooden table will absorb more oil than coated tables.
Here's a video on how it all works: