To remove PVC glue, which is used to bond PVC pipes and fittings, you'll need a combination of methods due to its strong adhesive properties and quick setting time. Begin by applying heat directly with a heat gun or hairdryer at a low setting to soften the glue, being cautious to not overheat and damage the PVC. Once softened, use a scraper or a putty knife to gently peel away the glue. If residue remains, apply a specialized PVC solvent or acetone with a clean cloth to break down the bond, then wipe away. Always wear protective gloves and work in a well-ventilated area to ensure safety. For stubborn glue, repeating these steps may be necessary.

Deleting Yarn, a popular package manager, depends on how it was originally installed. If it was installed via npm (Node Package Manager), you can remove it by running `npm uninstall -g yarn`. For those who installed Yarn through the system’s package manager, such as apt for Ubuntu or brew for macOS, you would use the corresponding remove command, like `apt-get remove yarn` or `brew uninstall yarn`. It's important to also check your system's PATH environment variable to ensure there are no lingering Yarn directories after uninstallation. Always back up your project dependencies before making changes to the package manager to prevent any loss of work.

Painting a polypropylene tarp requires a few crucial steps due to its non-porous nature, which makes adhesion challenging. First, clean the tarp thoroughly to remove dirt and grease. Scuffing the surface lightly with fine-grit sandpaper can help the paint adhere better. Use a primer designed for plastic surfaces; this is key to ensure the paint sticks and doesn't peel off. When selecting paint, opt for acrylic or spray paints specifically formulated for plastic. Apply the paint in thin, even coats, allowing adequate drying time between layers. Be aware that even with these steps, the paint might not be as durable on a polypropylene tarp as on more porous materials.