Unlike the case of oil painting, the artefact to be experienced is itself a process rather than a static entity.
In the case of the process of oil painting, the outcome might be the work as it is exhibited.
He showed the writer one oil painting.
It's something like oil painting.
I am no advocate of it as an oil painting.
If the individual wants it, this might be a new motor car; a more discerning person might want a valuable oil painting.
I think it is correct to describe it, as they say in the art world, as a finished sketch rather than an oil painting.
He started taking oil painting lessons when he was 8.