[AaronBurns]

If you construct the correct mixtures of chemicals found in common carpet and upholstery stain removers and you let the consumer mix them to use and place in a spray bottle, then you have no need to repaint the inside of your house. Just check the amounts of chemical mixtures with the colour chart on the bottle and easily spray you walls in an hour instead of a weekend. Try a pet stain remover on your wall and you will amazingly see it change colours. Much less expensive in materials, labour and especially clean up!

Reward: A stable and correct colour change!