How to fix paint defects

Support Materials and Textures
1

Hello
Im new on blender and I found an error that I can not solve

then i try to hand paint something on blender its leave a weird defects, this happen then i use mirror modifier to paint (because i want the sides be same)

http://i.imgur.com/Vudzi2Z.jpg
Vudzi2Z.jpg727×401

on this example you see lines but i want all white, how do i fix this? i want keep using mirror for speed up the painting, or have another way to paint both sides at same time without use mirror modifier?

sorry my bad english, is not my main language

2

I finaly found the solution

there exist ah symetry option on paint tool, using this options the results are without defects

moderator can close this topic, thanks