Brown/Red dots on window after renovation?

[rkinsella]

Hi folks,

Just finishing a substantial renovation of our house. Two windows where left in situ during the work and now have a red/brown substance on them that won't be shifted.

Any idea what if might be?

Ray K

 

[foxhole]

Was there any welding involved?

 

[rkinsella]

Not sure on welding, but there is a lot of steel work in the house

 

[Burnerman]

Someone used an angle grinder nearby, Ray?
John

 

[rkinsella]

Someone used an angle grinder nearby, Ray?
John

I would say so, yeah. The house is mostly steel at this point.

 

[Burnerman]

If you can't pick the bits off, 10 to 1 its metal particles stuck to the glass and plastic with heat
Its brown due to rust
John

 

[rkinsella]

If you can't pick the bits off, 10 to 1 its metal particles stuck to the glass and plastic with heat
Its brown due to rust
John

 

[rkinsella]

Pretty every window...

 

[Burnerman]

Oh sheet
You'll probably see the particles burnt into the plastic too, if I'm right.
Can't really see what else it could be, unfortunately.....maybe the contractors have been using a Stihl steel cutting saw or whatever in the vicinity.
John

 

[rkinsella]

Oddly the uPVC appears to be fine

 

[Burnerman]

Maybe they were cutting near the glass before it was installed.....who knows.
If the glass is etched though, I don't think there's much hope for it
John

 

[Lower]

You could try some iron-x. It’s used for taking iron brake disc particles off car paintwork. Might remove the rust spots but won’t heal the etched glass.

 

[Burnerman]

Autoglym 's Magna is another one, great for bodywork and glass.....for sure worth a try.
John