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A problem with plastic (32 posts / 1,343 views)
Tinhead Tinhead
Posts: 17,089
#1 12 Feb 2021 19:15
0
This is from my Ebac dehumidifier. It's a cover that goes over the LED's that show the status of the machine.
Nothing wrong with the LED's they are nice and bright but when this tinted cover goes over them they are hard to see, the cover must have darkened with age. The cover is made entirely of dark see through plastic rather than clear plastic with a brown coating.
So my question is how to make the dark brown not so dark. So far I've rubbed it with toothpaste and soaked it bleach but it hasn't made much difference, any other ideas?



I've asked ebac about a replacement part and they only supply this part along with the pcb which is a fortune.
Andydave
Posts: 840
#2 12 Feb 2021 19:31
0
In reply to Post #1
You wont be able to
tazi tazi
Posts: 4,859
#3 12 Feb 2021 19:36
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In reply to Post #1
Might sound silly but have you thought of putting it in the sun?. It's not too hot to warp it and may lighten it up. I even got a red face working in the garden in the bit of sun we had today.
Tinhead Tinhead
Posts: 17,089
#4 12 Feb 2021 19:54
0
In reply to Post #3
I was wondering if it might darken it. I've heard of hydrogen peroxide and UV light though.

@Andydave
Do you have a good knowledge of this sort of thing?

tazi tazi
Posts: 4,859
#5 12 Feb 2021 20:18
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In reply to Post #4
I thought that if stuff isn't uv protected then it'll fade. Could be wrong though.
tazi tazi
Posts: 4,859
#6 12 Feb 2021 20:31
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Got me thinking has this thread.

Failing not being able to get it lightened up I'd look to see if I could drill a hole in it or two as you'd see the light then.
Tinhead Tinhead
Posts: 17,089
#7 12 Feb 2021 21:06
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In reply to Post #6
Nah that'll look naff
duggs
Posts: 5,559
#8 12 Feb 2021 21:16
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In reply to Post #7
Only thing that comes to mind is a solvent cleaner
This stuff melts the top layer of upvc
I couldn't say how it would react with that material tho

Owatrol do some decent products for plastic restoration, might be worth a glance at their website
(polytrol is the one I'm thinking of)
tazi tazi
Posts: 4,859
#9 12 Feb 2021 21:35
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In reply to Post #7


Could also look posh.....
Tinhead Tinhead
Posts: 17,089
#10 12 Feb 2021 22:32
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In reply to Post #8
That polytrol looks interesting. I'm not sure if it will help but you can a 100ml tester for £5 delivered. Might buy to have a play around with
tazi tazi
Posts: 4,859
#11 12 Feb 2021 23:18
0
Strangely enough I've an unused tin of polytrol.
duggs
Posts: 5,559
#12 13 Feb 2021 06:22
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In reply to Post #10
It's cool stuff, it can really bring stuff back to life that would otherwise get binned.
I kept buying it by mistake when I wanted floetrol, they should really take a look at their product naming

The solvent cleaner is also really useful with a bit of common sense applied as to what you use it on, pretty cheap in toolstation too
Tinhead Tinhead
Posts: 17,089
#13 13 Feb 2021 10:27
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In reply to Post #12
I ordered the Polytrol trial size last night. I'm not sure if it will help in making that plastic clearer though but it looks interesting stuff and worthy of a place in my man cupboard along with the Hydrogen Peroxide I ordered that's meant to be good for plastic that's gone yellow.
Not sure what solvent cleaner you meant there's a few in Toolstation.
Just looked at Floetrol and that could be added to my next decorating job.
You could be costing me a fortune
duggs
Posts: 5,559
#14 13 Feb 2021 10:46
0
In reply to Post #13
It's the upvc solvent cleaner

Floetrol is great, gives you a bit more time with acrylics and flattens the texture. I use it through a sprayer too as some paints don't really take thinning with water and you get a sort of subtle wood chip like texture.

More useful for diyers than professionals as you can't work at the same speed
Tinhead Tinhead
Posts: 17,089
#15 13 Feb 2021 10:49
0
In reply to Post #14
The Zep stuff Cheers
I've got to go to Toolstation so will get that, will be needing a bigger shed and cupboard
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