Guy's, this one has me stumped.
One of the guys in my office made a push along truck for his grandson. He decided to finish it with Tung Oil and as instructed on the can diluted the first 2 coats with White Spirit.
He tells me that as it dried, a waxy residue seemed to form on the surface. Just like wax it rubbed off but again repeated for the second coat and again on the undiluted final coat.
I've not met or heard of this before, even in the cold we are experiencing (it being winter here).
Any ideas appreciated.