[Blast Away]

I never heard of them until this morning.

Been asked to demo clean a panel on a unit but they only want heat no chems.

It sounds like one of them where the client tells you how to do the job.

Don't know what it's soiled with but the call was from a southern softie so it'll most probably be general dirt and an overkill of excellence to bring it back to clean is what's required due to recommendations from some c**t sat behind a desk.

A quick google tells me they're UV resistant.

Anyone experienced this material?

[BDCS]

They are just plastic coated steel cladding panels. The plastic coating has a leather effect which holds the dirt and because if this when cleaned badly show the streaks. What has probably happened is a "northern numpty" has cleaned them in the past with excessive hypo from the top which causes clean rundown and excessive dwell which is hard to remove. I bet the southern softie you spoke to has just dragged the plans out of the cupboard and read the name from there. Tin cladding to you and me

[chris scott]

Start from the bottom work your way up. You will get better results from "soap" and agitation from a brush on a pole (sometimes no amount of "pressure washing" will clean the oxidation). Excess heat can can cause the plastic to delaminate from the metal (extreme case scenario)
There  i go knowing all again. I can recommend a jollop to try if you wish.

[BDCS]

Start from the bottom work your way up. You will get better results from "soap" and agitation from a brush on a pole (sometimes no amount of "pressure washing" will clean the oxidation). Excess heat can can cause the plastic to delaminate from the metal (extreme case scenario)
There  i go knowing all again. I can recommend a jollop to try if you wish.

Yes but should you read the post the OP has said the customers has stated heat no chemicals so you'll have to refrain from pushing your wares on this occaision

[chris scott]

I did read the post ...but i would still try to explain that better results would be obtained by a different method. I would try the analogy.... that you can wash your dishes with warm water but better results occur when you use a bit of fairy and a dish cloth!.

[Rob_Mac]

Mate

We did this to the store @ Archer Road, Sheffield - last September.

Tried to pressure wash, tried to hot pressure wash, nothing, tried with CIF, not having it.

That's when we got through 75 litres of G101

'Oxidation' is not being used in the right context

From Wiki the great

The oxidation state is an indicator of the degree of oxidation of an atom in a chemical compound. The formal oxidation state is the hypothetical charge that an atom would have if all bonds to atoms of different elements were 100% ionic. Oxidation states are typically represented by integers, which can be positive, negative, or zero. In some cases, the average oxidation state of an element is a fraction, such as 8/3 for iron in magnetite (Fe
3O
4). The highest known oxidation state is +8 in the tetroxides of ruthenium, xenon, osmium, iridium, and hassium, and some complexes involving plutonium, while the lowest known oxidation state is −4 for some elements in the carbon group.
The increase in oxidation state of an atom through a chemical reaction is known as an oxidation; a decrease in oxidation state is known as a reduction. Such reactions involve the formal transfer of electrons, a net gain in electrons being a reduction and a net loss of electrons being an oxidation. For pure elements, the oxidation state is zero.

The oxidised layer needs to be broken down and I don't know you can do that without some assistance, chemical or other, as yet not known method.

If you do manage it without chemicals I would be interested to know, we do a lot of these.

Good luck

Rob

[Blast Away]

Going doing a demo/test on it now.