Will you make the Lines smooth or are they going to stay like that?

I'd say never use the paint bucket tool. Instead of that, make a layer under the lines layer and paint it with the color you want (using the brush tool)

The lines are zig zagy. You should try to improve that. Also, you can also add a mirror if it is going to be a helmet type thing.

i will make the line smooth at the end..


hmm.. is there any difference on coloring with paint bucket tool with brush tool?


mirror is bit tempting but, what i am aiming is not a helmet, it is a mask.

in filling the layer under the lines with color then no, there wont be a difference. If you're gonna use the paint bucket tool on the same layer the lines are on, then yes, there would be a difference, since the paint bucket will leave these ugly white lines.
also, I can see how messy your lines look. If you're using a mouse I'd strongly recommend using lazy nezumi pro to make smoother lines.