Consider the lock to be used before you treat a snare.
If you are going to use FMJ (Full Metal Jacket) on a snare, you are basically WAXING a snare...
FMJ, it should be pointed out, turns a 'milky' color when wet and here, where I snare, in winter, it's ALWAYS wet !
Consider that you may be illuminating the cable against a darker background in wet weather. Might be okay in snow, I don't know.
I stopped boiling snares, period. If you use the snares in a short time span, you'll be alright boiling them, but boiling cable can and does, remove the oil from the inside, causing it to rust from the inside out in anything but dry arid environments. That rusting causes your cable to 'fray' and break easily.
Now if using Formula 1 to 'color' a snare, again, consider the lock used.
Some locks will gum up, impeding their speed of closing. Some locks will just peal off the F-1.
I have used it and I thinned it far more than the recommended instructions.
I then dipped the cable a second or third time, allowing drying time.
I currently just use oak tannin to 'stain' my cable, which makes it a natural brown.
It comes from using the brown wet leaves as they 'bleed off' in the fall.
This way, nothing is 'on the cable' to impede it.
Any time you add a layer of something to the surface of the cable, no matter how thin, you run that risk.
If you want a faster snare, use quality cable, a fast lock and learn how to properly 'load' a snare.
Cable doesn't have to be colored to catch most animals. Never let anyone tell you it does.
There are a few animals that will spot shiny cable however, hence the reason I 'stain' mine.
I want it to look as if it grew there !