[chris@c.m.s]

I've been using different solutions  trying to cut down on detailing while getting good slip,  I have used rinse aid with squeege off, and squeege off and fairy, both solutions have been used with ro water  It has been noticed that the paint/ coating is coming off from the window frame on one of my regular cleans, the frames are aluminium with a possibly  plastic coating on them which does leave a powder residue on a wet finger, however the problem has only recently occured and i'm wondering  if useing rinse aid has caused damage to the coating. Has anyone else experianced this? see pic below.     

[DP]

Not sure the content of rinse aid but if it is acidic then it may of had a long term effect but very unlikely I would have thought.

It is far more likely that the coating is at fault from production. I have seen coatings disintegrate from bad production within my involvement with insurance claims (normally commercial) very late into the 10-15 year warrantee. We used to have a specialist company colour match and re-coat sections on site.

Your activity with washing and the use of chemicals may have been the cause but very unlikely to be the reason, otherwise you would have come across similar problems elsewhere.

Also when you go back just have a look at whats above the window to see if there is anything obvious. long term leaking gutters, driping boiler flue's, splashing drain pipe hoppers from bathrooms etc will wash out salts and brick sand causing all sorts of damage.

For peace of mind I would look at a few others closely just to make sure that there is no pitting occurring.

[Ian_Giles]

Good reply from DP
Those windows in the pics are not new and I'll bet the odds are that they are also getting a lot of direct sunshine?
There have been many posts about the old style 'coated' aluminium windows becoming powdery, in fact I don't think I've come across many of that particular type of window frame that haven't been powdery!!

Just like painted windows, the surface breaks down and oxidizes over time, except that with these coated aluminium frames, they don't get painted again when they do!!
They are an even bigger pain to clean with WFP
Certainly won't be the rinse aid


Ian

[chris@c.m.s]

Ok thanks guys, maybe the last cleaner didnt wipe the sills and that is where it is worse, along with some parts of the frame where the scrim may have touched while detailing,  you are also right in as much as all affected windows would receive direct sunlight, did panic me for a moment though  .   

[gibbouk]

thats what rinse aid does to allloy, it turns it black. it has the same efect on chrome

[dai]

I've been using rinse aid for well over a year now, with no problem whatsoever.
I put a dash in the bucket along with some cheap washing up liquid. It's the best solution I've ever used. It is brilliant, especially for wagtail and backflip users. It almost eliminates suds, has plenty of slide, and leaves a brilliant finish.   Rinse aid does no damage to dishwashers and I can't see how it could damage window frames.
Lidle do it for £1.70 a litre. Try it. Dai