Instead of cracking vertically like most crackle polishes, the Barry M Croc Nail Effects creates a pattern reminiscent of a reptilian hide as it dries. A thin coat would give you the smaller "scales" you see in Vicky's post and a thicker coat will give you bigger scales. I guess this means if you want an ultra realistic pattern, you would do a thin coat on either sides of the nail and then a thicker coat along the crown of the nail.
Whilst crackle polishes tend to have the same consistency as cottage cheese, the Croc Effects polish is very thin and easy to control. It also dries glossy instead of matte.
The application process (dude, did I just call putting on nail polish an "application process?!) is also slightly different to applying a crackle polish. Crackle polish can only be applied to dry nails, but the Croc Effects polish must be applied to nails that are still slightly tacky in order for the pattern to develop. It takes a while for the pattern to finish developing so hold off that top coat for a few minutes.
I found that it worked best over polishes that are 1 coat opaque, metallics and frosts in particular create a really good contrast. For my NOTD I used Orly Rage - a beautiful rose gold metallic.
Barry M products are unfortunately not available in Canada but you can purchase the Croc Nail Effects for £3.99 from their online shop which ships internationally. Those in the UK can find it in Boots and Superdrug.
