It's no problem It depends on how skilled you are. It's different for every person. You might be able to paint on mirrors. To be honest i'm not familiar with this type of paint, but if you were to paint on a mirror it might chip off. However if you want to paint on a mirror i would use acrylic paint It sticks, and shouldn't come off. If you are using acrylic, don't get ANY on your clothes or surrounding objects that you do not want paint to get on. It's permanent.
ooh i see.. but since i'm pretty much a beginner, which one should i use acrylic or gouache? and what's so special about gouache? ooh, i just knew that acrylics ARE permanent, no wonder why no matter how many time i wahed my clothes it won't come off --"
thank you so much for the info! you're really helpful!
It's no problem.Glad i can help There is nothing really special about gouache in general. It's just another paint. It's similar to watercolours, but it is opaque (can't see through it, just like acrylic) One big differnece between gouache and acrylic is that gouache dries lighter, while acrylic dries darker. This is one reason i hate acrylics. They can look so darn dull. That should be a big factor when you are choosing between the two. Here is some info on gouache paint [link] I would go for acrylic, since they tend to be a bit cheaper.
Actually, acrylic is the fastest drying paint. It dries in minutes. Though this depends on how think you apply it. Unfortunately i don't know if gouache is permanent. Like i said im not familiar with it. You should look it up