My 2 cents here is the same as stated above. Enamel paints take much longer to dry than acrylics.
I would wait a minimum of 2-3 days before attempting it.
Also, don't forget to spray a clear (gloss) coat to protect the base from the washes. I personally use Rust Oleum Clear. After my base is dry, I shoot a thin clear and let dry for 24hrs. The only place I do not use gloss clear, is on the lower hull by the road wheels. I apply the wash directly to the base coat. This gives a great build up and dirty look to it.
Once my oil wash is applied, I wait for 6 hrs before attemting removal (I also use Winsor& Newton with 100% mineral spirits) You could remove sooner but, most of the wash will be wiped away.