Grind or rerender?

[Eeeek]

View media item 103108
View media item 103107
Hi everyone, amateur DIYer here looking for a little advice. This is our neighbour's shed which backs onto our garden. I can only assume the previous owners here must have rendered it themselves as there is half a bag of now rock hard cement in our garden.

Do I re-render or can the unlevelness be ground out? What is the best disc to use if so? As you can see I have attempted to grind it but it didn't do much.

For context, I plan on painting it and making it into a massive chalkboard for my kids.

Thanks in advance!

 

[blup]

If it's for a chalkboard probably best to render it smooth...

Caveat, the photo does not appear to have been uploaded.

Blup

 

[Eeeek]

Thanks Blup tried again so photos now included!

 

[Brigadier]

I presume you have your neighbour's permission to both work on it, and use it as a chalkboard afterwards?

 

[geraldthehamster]

Is it some kind of party wall, or does it belong to your neighbour? If the latter, you can't do anything to it as it's not yours.

 

[Ian H]

What about fixing a big board onto it?

 

[dannymassive]

If you're going to use the black chalk board paint for your kids, surely you'd be better off battoning it out and using a marine grade ply to board it? End result after a few coats of paint would be much smoother than render and save you a fair bit of hastle. If it turns out that the wall isn't yours, simply use fence posts and some 3x2 to affix the ply to?

 

[Eeeek]

Thanks everyone, all sorted!

 

[dannymassive]

Thanks everyone, all sorted!

What did you decide to do?