[Timmy Boy]

Hi Guys
Your advice would be really appreciated, We have been asked by our client to remove some spray paint from their new building (signed for the building on Friday, came in on monday and found it all sprayed up!) We were able to remove the paint from the brickwork and the new powder coated door but are really struggling on the older green cladding. We have removed some but it is leaving a shocking ghosting. I have seen a product on anti graffiti.co.uk called 'shadow lifter' but wondered if anyone had used this or had any better ideas. I used the graffiti gel, left to dwell for 1/2 hour but still the marks remain. I have attached some images to give you some idea on the issue. They know that they might need to repaint as the cladding is old and the green comes off on your hand even when the panel is dry
Hope you guys can help!
Regards
Tim

[BDCS]

That looks like the paint has removed the oxidation and left a clean line rather than a shadow. Try T cutting the area

[Timmy Boy]

Does that mean that the paint lines are actually the original panel colour?

[Matt Gibson]

I can still see silver paint lines. We did a job similar, it was a ba5tard. We used some graff chem from DC chemicals, and it got some off, but then we had to use other stuff we get locally to remove the rest. Had to use scouring pads and scrub some of it too. Was a right pain.

[Richy L]

From the look of it the cladding has algae on it and has turned green, except where you have cleaned it.
Have you used graffiti removal chemicals that are designed for use on sensitive surfaces?

[Timmy Boy]

Hi All
I have attached a zoomed out photo so you can see what it looks like. I used a two products, the demon pressure washers graffiti gel as well as the jangro one which is for plastics and both produced the same results. The client has asked if we could make it a straight edged section so it doesn't look so unsightly but that would use barrels of stuff!

[BDCS]

Electric buffer and a cutting fluid - t cut, farcla g3 or similar. The algae is there because there is a porous layer of oxidation. Do a test patch by hand and you should see.

[chris scott]

I cant really tell from the pictures but it looks to me like the ghosting is highlighted due to the "clean patch" around it where it has been "pressure washed"
Try cleaning the whole panel with tfr or bleach and fairy liquid and a soft brush (both relatively cheap) or something similar. It will not draw your eye to the ghosting and take the "pressure washing" marks out of it....you might get away with it.
Maybe then as Carl says try a light abrasive on the residue paint....cutting compounds come in different "grits" (start smooth).
Is it plastic/vinyl coated or painted ?
In future always clean a small test clean/ patch so you know what the end results will be.

[Blast Away]

Looks to me that the chem you've used has activated the claddings layer of paint.

[Blast Away]

Activated maybe not the right choice of word. It's attacked it basically. The pre condition of the coating has lightened and discoloured from the elements. Therefore the chem conflicting with that area has brought out its original colour shade.

[Richy L]

The site that you have bought 'shaddow lifter' from states that it should be used on brick, stone and concrete. Or porous surfaces.

You should not use it on cladding as it can, and looks like it has, damaged or discoloured it.

[G O Cleaning]

Why is it there are sponsors / advertisers on this site selling graffiti removers plus a training company yet they never offer advice 

[chris scott]

Why is it there are sponsors / advertisers on this site selling graffiti removers plus a training company yet they never offer advice 

Who offers the training?

[G O Cleaning]

Why is it there are sponsors / advertisers on this site selling graffiti removers plus a training company yet they never offer advice 

Who offers the training?

your mate  - BCA ? Surely they cover graf removal ??

[chris scott]

 your mate  - BCA ? Surely they cover graf removal ??
[/quote]
I have changed my mind about him being my mate 
Initially i was really impressed by the people he had "teaching" the courses. No I realise ....I  was impressed  by the people "teaching" the courses and not the BCA...does that make sense ?
For example....a man with a wealth of knowledge on cleaning stonework....
http://www.restorativetechniques.co.uk/tag/jamie-fairchild/

[BDCS]

BCA ?

http://www.cheerleading.org.uk/

http://www.british-car-auctions.co.uk/

And to satisfy the equal opportunity policy

http://www.bcafrica.co.uk/about-us/bca-uk

[chris scott]

http://www.buildingcleaningacademy.co.uk