Solder mask peeling

[Njackste]

I bought a stacker arcade machine led PCB 2nd hand but some of the solder mask is peeling how can I fix this.

I dont have specialised equipment I just have a soldering iron and some tools.

I have never replaced solder mask before and I don't know how to do it.

If I use an mg chemicals conformal coating pen will that work to insulate the PCB and to prevent shorts with the other side of the board.

[ataradov]

Why do you need to replace it? It is really only necessary during automated soldering.

Given that it is peeling, I assume it is the type of the process that tins the traces first, so there should not be exposed copper that may corrode.

[Njackste]

There is exposed copper on the board it's not on traces its on through hole

Do I need to replace it.
Will it cause shorts if I dont

[ataradov]

Missing solder mask will not cause shorts unless something else touches the board. But that would be a bad design no matter what.

[Njackste]

Thanks

[tooki]

I know I’ve seen solder mask pens in a catalog, I forget who makes it. But as others have said, it’s usually no problem. What I like to do, if there’s exposed copper, is to tin it with solder so the copper won’t oxidize. But this is not in any way a requirement.