Help! Is this mould?

[Cluelesspainter]

Hi there, I recently had some night storage heaters removed and while sanding to prepare the wall where the heater was for painting, this pink stuff appeared where I had sanded (white bits are filler). Anyone know what it could be? It seems slightly more pink than the plaster, but has been behind a heater which has been on more or less constantly for over a year. The wall has been cleaned with sugar soap and water (before i discovered the pink stuff), and I’ve wiped it over with Astonish mould remover and got nothing off but a chalky paint residue.

I’m about to paint the wall so really don’t want to paint over anything dodgy!

Very grateful for any help or advice!

 

[RandomGrinch]

To me, that simply appears to be an underlying paint layer that you have exposed from sanding and wiping.

 

[Cluelesspainter]

To me, that simply appears to be an underlying paint layer that you have exposed from sanding and wiping.

Thank you! I did think that, but the other heater that was removed also took off a layer of paint and plaster and there was no pink paint underneath. I suppose they could have just painted that one wall though