Ok so....I grabbed one of my double layer masks and air freshener as it is visible when sprayed.
I went into the sunshine, test sprayed just the aerosol....yup visible.
Tested through the mask at 2" away.....not visible.
Feel free to test with aerosols too.....not in the least scientific but it is interesting.
Now you know
With a home made mask, you can expect variation due to a variety of factors, even when using the same materials in the same order.
Cool that you tried!! Thank you for posting your results