I suspect that what you are possibly trying to say here is that...yes whilst you do want over spray on the feet ,you are possibly simply getting to much dropping onto this area...hence your question about extraction
I would certainly not advocate the use of a moisturizer/barrier cream on the feet as this will simply cause a horrible tan line.
I disagree, I am nouvatan trained (and am one of their trainers!) and we always use barrier cream on the feet and I have NEVER had a horrible tan line
Yes apply a barrier to the toe nails to prevent "grabbing" here and turning them orange
I have a suspicion that the problem you are having emanates simply because there is far to much over spray so I would seriously look at your technique which if right will not require the use of extraction.
This is so true, when I was new to tanning I was using way too much solution and feet were far too brown. Turn that dial down and the problem will be largely eliminated
You should be using no more than around 50ml solution per full body application
If you are using more simply turn down the output volume dial on your gun and get in and work closer to the skin...about 8 inches from the skin is ideal.
By doing this you will dramatically reduce over spray from dropping onto the feet and your problem will be solved
HTH and good luck
