IronWolf,
Yes I do plan to filter my oil the filter I use is designed for diesel fuel, or gasoline filter. This filter unit acts as a water separator to. It will not have a paper filter element, just a fine screen. To answer your question yes once the interior is red hot, and the oil has been adjusted, shut off the propane. I usually turn the propane back on, oil off, for shut down, to help burn the remaining oil out of the forge. The oil feed will be gravity fed to the burner. There are quite few waste oil designs for shop heaters on the internet. Some I like some I don't.
Matt,
You are right this burner is designed after the Moya burner. I have one similar to it that use in my foundry furnace. It uses propane preheat as well. Thanks for the replies I will get more photo as I get it up and running.
Larry