Nice Door :icon_thum. If I may interject, old reclaimed heart pine is air dried pine, it's MC is probably around 12~14% and the pitch has not been set in accordance to the correct kiln schedule. I would have to check but I think it needs to be brought to and remain at either 150 or 180 degrees for 24 or 48 hours to set the pitch (someone chime in here). So the nit is when the pine gets warm the unset pitch will seep from the lumber creating a sticky mess. Machining like running a blade through it with a table saw often generates enough heat to cause the pitch to seep in the area where it was heated up. Best bet is to have it properly kiln dried and ensure the pitch is set at the end of the drying schedule. Stick a chunk in the sun on a hot day and let it get good and hot, see what it does. This is the main reasons I don't cut pine on my mill, even when it's green and full of water it's still hard to control pitch build up. Unlike drying hardwood, pine dries fast and at higher temperatures but it requires an extra step (pitch set) to be made usable for furniture projects.
Thanks