Paint brushes are a permanent part of a Neopet's appearance. Once applied, they cannot be removed.
However, there are a few options if you want to change your Neopet's look:
* Get a new paint brush: You can use a different paint brush to change your Neopet's color or pattern.
* Use a temporary item: You can use a temporary item like a hat, clothes, or a background to change your Neopet's appearance without changing their permanent paint brush.
* Use a morphing potion: This will change your Neopet's species, which will also change their appearance.
If you're not happy with your current paint brush, you can always try experimenting with different looks!