>>10804301If it is dry it wont spread to other clothes. You could try to soak the clothing with some lighter fluid and wring/scrub the paint out but that could also damage the clothing.
>>10804189Gloss isnt necessary. Its mainly to protect a layer of paint than the plastic. For straight plastic you dont need to use gloss. With those gundam markers theyre just an ink. There is a pour type marker and that is a little different and works like tamiya does. Most people use a matte topcoat since it cuts alot of the plastic look and shine. Not that necessary either. Just depends on what you want the end results to look.