Help with painting a wall

[Tomrossp]

I'm currently stripping the paper off my wall to paint underneath it but I came across this

Is this safe to paint over or do I need to do anything else to it?

Untitled

• Tomrossp
• 4 Sep 2013
• 1

 

[PrenticeBoyofDerry]

It's not unsafe to paint over!

 

[Tomrossp]

But will it be noticeable once painted over? I mean I'm gonna give it a quick sanding down before I do paint