I think so, native americans or "indians", i believe used paints to enhance their spiritual awareness, and shamans also, but you would be better off asking a council member of Paths of the shaman coven, or the leaders.
Some sigils and seals also have good effects, usually these are to be worn as pendants, but if you get them as tattoos, I guess you cant argue with that.
i think ive read some spells before in which you painted symbols onto your body for protection and healing. can't remember where i read it though. i should imagine that is is perfectly possibly to use painted or tatooed symbols on ure body for increase in energies, but take ravens advice and seek help from covens more experienced in this field.
Well if you tattoo a fire on your hand your energy will be stronger, but not because the paint it's because of your mind. You could paint yourself with dog poop and result would be same, just if that makes you confident.
Try without silly collors on your skin, believe in yourself more.