Graffiti barrier

Hi all,

Living in inner London and having a nice stretch of clean brick wall, I'm slightly amazed that we've never attracted the attentions of vandals, errrrr I mean talented exponents of the vibrant art of the people.

Anyway, in a preventative mood I've just had a look at barrier products - stuff that you paint on the wall, which blocks the vibrant art from penetrating. Screwfix have this stuff

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have any experience of it, especially the graffiti-removal process? I see that the manuafacturer wants you to pressure jet it with water at 80 degrees celsius:
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sounds like a fairly dangerous activity in its own right. Reckon that my B&Q pressure water hooked up to the combi (may 60 degrees I guess) would be any good? (PS Please do NOT take this as an invitation to recommend I invest tear out the combi and switch to some form of thermo-nuclear heat banks, the people concerned know who I mean ;-)

Cheers!

Martin

Reply to
Martin Pentreath
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> Anyone have any experience of it, especially the graffiti-removal

This type of sacrificial anti graffiti coating is similar to floor polish in that it forms a coating to prevent the paint/dirt being absorbed by the wall/floor.

Once painted its stripped off taking the graffiti with it. They do work fairly well, but its a continuous cycle coat/strip coat/strip coat/strip.

Commercial hot water pressure cleaners (single phase) operate @ up to 150 bar x 10 ltrs/min and reach around 90c. Fairly safe activity with a little common sense. However, they pressurise the water first, then heat it via a continuous flow boiler.

If you heat the water first, you have to keep the temperature below 60c or the pump will cavitate & wreck itself.

Your B&Q jobby is prolly around 100 bar x 6 ltrs/min and limited to 60c, so it won't work that well. You might find it difficult to remove the coating, which could look worse.

Might be easier just to use a graffiti remover if you get attacked, they are good if you get in quickly.

Reply to
The Medway Handyman

My DeltaJet pressure washer says 40C max water temperature. It uses the water to cool the motor.

Reply to
Andrew Gabriel

Karcher have used water cooled motors for some time on their hot water machines, benefit being slight pre heating of the water prior to it being heated & the facility to use one end of the motor for the pressure pump & t'other end for the fuel pump & combustion fan.

Rare on cold water machines, Gerni introduced a 'hot box' machine in the

1970's with a water jacket on the motor that meant detergents could be applied under low pressure, but at an increased temperature as a pre spray.
Reply to
The Medway Handyman

There are spray on graffiti remover products that work well. I've found that the best way to stop graffiti is to catch the little bastards. Around here they always use a vehicle (their own and not even stolen), and with my video cameras and still cameras I get their rego numbers and the police do the rest. Failing that, a dummy video camera with a flashing red light does keep them away.

Reply to
Matty F

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