[Darranvps]

Hi
One of our customers has anti grafitti coating on the bottom half of their hotel walls - as you can see from the picture it is quite badly stained.
The hotel owner reckons somebody tried bleach (I suspect Hypo)

Any ideas appreciated
I would normally walk away but it is for one of our biggest customers............

[chris scott]

Is it sacrificial or otherwise?

[Roger Oakley]

Unless I'm seeing wrong, not seeing any bleach staining only staining from the air-ducts?
For me clean & re-anti graffiti coat the surface.

[Darranvps]

They tried bleach or Hypo to wash it off.

[Roger Oakley]

They tried bleach or Hypo to wash it off.

To wash what off?

[chris scott]

Hypo is bleach...is it sacrificial or not ?

[Darranvps]

They tried bleach or Hypo to wash it off.

To wash what off?

The black run marks I suppose - ive not been out to see it yet

[Roger Oakley]

They tried bleach or Hypo to wash it off.

To wash what off?

The black run marks I suppose - ive not been out to see it yet

Heat, then re-coat the anti-graffiti coating.

[Darranvps]

Hypo is bleach...is it sacrificial or not ?

I know it is a bleach we go through about 120 litres per month when were busy!

I think the customer probably means domestos or something similar as he had previously hired a local company to try and remove the black stain marks.

[Darranvps]

They tried bleach or Hypo to wash it off.

To wash what off?

The black run marks I suppose - ive not been out to see it yet

Heat, then re-coat the anti-graffiti coating.

I think the idea is to save the anti grafitti coating as that is what my customer has applied to the hotels wall.

[Roger Oakley]

They tried bleach or Hypo to wash it off.

To wash what off?

The black run marks I suppose - ive not been out to see it yet

Heat, then re-coat the anti-graffiti coating.

I think the idea is to save the anti grafitti coating as that is what my customer has applied to the hotels wall.

That's all well and good, but you may have to re-coat to get an even finish after cleaning.

[chris scott]

Is it sacrificial?

[Darranvps]

I will go and take a look later this week and see whats what with it.

[Rob_Mac]

Darren

I worked on a massive graffiti problem on the back of a store at Hayes, this had a sacrificial coating on it, soon as we pressure washed it it blew off the brickwork.

I would take some washing up liquid and a bucket of water and see if it can be cleaned up with a brush and rinse off.

Roger is getting on but because I have youth I can see that it is on the LH side by the arched window. You can see that all of the coated area is streaked and I don't think it needs pressure washing but soft washing off.

If it is a sacrificial coating and you pressure wash it you will definitely need to re-coat.

Rob

[Matt Gibson]

How old is the AG coating? Looks like the whole area that has been coated is discoloured. You can see the line where they applied it to. Could just be old/cheap stuff?

[Darranvps]

Reading through the e-mail

The hotel owner has stated that somebody came with a pressure washer and a bleach to try and shift the stains and it did not work.

My customer reckons they applied the Anti Grafitti coating in August 2012, I suspect that they coated over the stains 

I will ask the questions tomorrow .....and when i visit the site.

[Darranvps]

Is it sacrificial?

No idea until I speak to somebody tomorrow

[Darranvps]

Darren

I worked on a massive graffiti problem on the back of a store at Hayes, this had a sacrificial coating on it, soon as we pressure washed it it blew off the brickwork.

I would take some washing up liquid and a bucket of water and see if it can be cleaned up with a brush and rinse off.

Roger is getting on but because I have youth I can see that it is on the LH side by the arched window. You can see that all of the coated area is streaked and I don't think it needs pressure washing but soft washing off.

If it is a sacrificial coating and you pressure wash it you will definitely need to re-coat.

Rob

Rob I will give Fairy a go

Other than that I will blast it with HOT water from the hotbox and see what happens - if the AG coating comes off they can apply some more...

[Rob_Mac]

Just finishing a 20 page Risk Assessment.

You get that Aquilla Hotbox out that should have been mine and knock the hell out of it

Rob

[chris scott]

If it is a  wax based sacrificial ,steam with a little pressure will remove it . If it is a permanent coating you will need a solvent. If it is a  fluoropolymer you will damage the building in the attempt to remove it with the metheod you have suggested.
Gather as much information about the coating,ring the manufacture, start with gentlest method  first.