Well, I took some advice some of you gave other users about cleaning
Apply acetone to your doll's marker spot using a cotton pad.
Pour either rubbing alcohol or nail polish remover into a dish, and dip your cotton pad into it. Rub the cotton pad over the marker spot on the doll. Your marks should start to fade away. Instead of acetone, you can use any alcohol-based cleaner or thinner.
So yes, most LEGO bricks would be at least partially melted by most nail polish removers, you could probably use acetone to fuse ABS LEGO bricks together permanently.
Common household products such as toothpaste, hairspray and vinegar can be used to remove permanent marker stains.
Toothpaste also works great for removing permanent marker from painted walls without causing damage. As previously mentioned, skip the gel toothpaste and ideally, choose one that contains baking soda.
Vinegar: Combine equal parts vinegar and water and apply on the permanent marker stain. Allow it to sit for a few minutes before wiping it away with a clean cloth. Toothpaste: Apply a little amount of toothpaste and rub it with a damp cloth over the marker stain.
Vinegar – Vinegar is a natural stain remover and cleaner. Use it like you would rubbing alcohol – dabbing it on the Sharpie marks and then wiping it off. Peroxide – Dampen a cotton ball with peroxide and use it to wipe away Sharpie from plastic. Rinse with water afterward.
Hand Sanitizer and Alcohol:
You can also apply a mixture of hand sanitizer and alcohol to remove permanent marker stains from plastic surfaces. Mix the two mixtures and apply them on the surface of plastic toys. Rub with a clean cloth.
Vinegar/lemon juice: Acids, like vinegar and lemon juice, can be effective against permanent marker stains. Though they are mildly acidic in nature, they can still dissolve mineral deposits, dirt, grease, and grime. White vinegar is also antibacterial and works best on synthetic fibers.
Lego torsos often have black or white squares on the neck joint, this is to help with the automatic printing process when producing minifigures.
I also commonly use Sharpies to add boot details to the bottom of LEGO legs. These are easily touched up in the case of wear and you can easily decal over sharpies once it is dry and clearcoated. Paint Paint is the most widely used method to alter LEGO part colors.
Yes. Baking soda and a stiff scrub brush can remove permanent marker from many upholstery fabrics. Sprinkle dry baking soda onto the spot as soon as possible after it was “markered,” then scrub.
Hand Sanitizer
Good thing there are many uses for it, one of which, stain remover. In fact, it may be the most readily available stain remover in a Sharpie emergency—and it works great for getting rid of permanent marker in addition to the germs on your hands. Squirt enough hand sanitizer to completely cover the stain.
You might find this hard to believe but removing Sharpie marks from a wall is super easy. All you need is a magic eraser and Windex. If you don't have Windex, water will work the same. Spray the stained area and wipe away the Sharpie stain.
Alcohol-based hand sanitizers do a good job of removing permanent marker ink. They reactivate the ink, allowing you to easily wipe the stain off. Cover the entire ink stain with hand sanitizer. Let it sit for about 30 seconds and then wipe off the ink with a soft rag.
Go ahead and label your plastic containers with a permanent marker. When you want to remove it, just reach for some hand sanitizer. A small squirt of hand sanitizer rubbed over the stain with a paper towel should take it right off.
Sponge rubbing alcohol into the area around the stain, and then apply it directly to the stain. Continue sponging the stain with alcohol, transferring as much ink as possible to the paper towels, and replacing the towels as needed. Rinse thoroughly and launder.
Simply dampen a cloth with WD-40® Multi-Use Product then gently wipe over the bricks – in seconds 'hey presto' they break free (and you're free to carry on tidying up!) Ensure you always wash off any trace of product after separating before handing to children or continuing use of your legos!
Clean your LEGO elements by hand using a soft cloth or sponge, and soap and water that's no hotter than 104°F/40°C. When disinfecting electronic elements (e.g., Hubs, motors, sensors), use disposable wipes or a microfiber cloth moistened with disinfectant to carefully wipe all external surfaces.