Hello. We would not expect this to remove paint, however, the adhesive can leave behind a small amount of residue once removed. However, this can be wiped down with a damp cloth and mild dish detergent/soap as needed.
You can't. It can only be unlocked from the inside.
you need to get this product! it works great for dogs and kids. Safety 1st OutSmart Lever Handle Lock, White
Thank you for your question. The OutSmart Lever Handle Lock is attached with adhesive. To remove the adhesive you may use a blow dryer to warm/loosen the adhesive then use a piece of dental floss to slide between the adhesive and the door to break the seal. After removing, you may use warm sudsy water to remove any remaining residue.
Trust who you live with :-)