I wanted to try this technique but was short in time.
I took two lens caps, the 67mm cap from my "good for everything" lens and a 52mm one which I don't know where it comes from.
The small one was set on top of the largest one. With shutter speed to 30 sec, both were left like so during around 15sec and then the smallest one get removed, not even masking the lens. The "Nikon" are on top one to the other (or almost) after the second try, bit of luck here.
I do not expect a great result for this challenge, as I said it is a try with this technique.
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Here is a good intention losing its perspective on presentation. Sometimes an idea needs further development to extricate it from the commonplace. If we can not save it, then we dump it and move on to the next. I understand your time problem and like you intimated at least you get to play with double exposure principles. There is always tomorrow.
Don't personally like the photo; i don't really see the difference in it all to much. Probably if you had focused on the texture a bit more and a different angle the shot woulda turned out better. Better luck next time.