I did a colourfill on my full metal rifle. Due to the stamping not being deep I did try using crayons but it looked like garbage and wouldn't fill right since just too shallow. I ended up watching a vid on youtube where the guy used nail polish so I tried that method. Worked out way better and was very simple. Items needed was red nail polish, white nail polish,
non-acetone nail polish remover and cotton pads. These are all things if you have a girlfriend or a wife they will probably have on hand.
Process was simple, paint over the logo you want done, let dry for over 25 minutes, put some non acetone nail polish remover on a cotton pad and lightly wipe. As you go it will remove excess. From my understanding this will work on polymer as well.
In the picture comparing both crayon is on left and nail polish is on right. Also note on the right panel that was right after it was done so still was wet a bit. There was no damage to the metal as you can see in the first picture
