Pro tip for shaders

Open your weapon bench. Go to armor coating and go through the whole list and purchase every skin you've been missing that you can buy with SP. I was sitting on about 70k SP from the last battle pass and just randomly began looking through it and was like holy crap there's a lot I didn't know about.

Probably unlocked around 7-9 skins!

You'd be surprised how many you've probably missed. 👍