You're gonna need more 1ml syringes.
But in the meantime, use some clear tape to protect the markings on the one you have.
I recommend against using clear nail polish.
I can envision it flaking off eventually and getting in your flavorings and
juice.
I wouldn't wanna
vape that!
I picked up a 100 pack of 1ml syringes from amazon for about 12 or so bux.
One of my best diy investments to date.
You will use the 1ml syringe the most of any size.
Also, make sure that whatever syringe you use for measuring your nic is a lure lock type if you are using blunt tips.
The blunt tip can shoot off a slip type syringe when under force.
Not really gonna happen often with flavorings because they are thin, but pg/vg will pop that tip off fast.
The last thing you want is nic flying everywhere.
I use 1ml for flavorings and additives such as sweeteners and menthol.
3ml size for nic.
10ml size for pg/vg.
When mixing large batches, I still use the same sizes aside for pg/vg which I also have 25ml and 60ml syringes.