To remove a sticker or a patch, in-game hover your mouse cursor over the skin and press the right mouse button. In the drop-down menu choose “scrape sticker” or “remove patch”. Press on the icon of the sticker at the bottom of the screen until the sticker fades away and you receive a notification. Press the “remove sticker” button to completely erase the sticker. With patches, the process is just a bit easier since you only need to click once and confirm the removal.