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Author Topic: yellowed plastic help  (Read 4203 times)

teddyt

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yellowed plastic help
« on: February 24, 2014, 07:06:59 pm »
chaps I have been offered a nice cabin motor boat, but parts of the tophull /deck have started to yellow, is this an easy fix or does re-painting it fix this and if so what paint is best
Thanks
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fullboat

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Re: yellowed plastic help
« Reply #1 on: February 25, 2014, 08:38:09 am »
Ive always found that plastic is cleaned well with diluted floor   cleaner.
The one I use is called Handy Andy in Australia.
I think it is an Ammonia based cleaner non abrasive, just liquid.

Andy
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tigertiger

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Re: yellowed plastic help
« Reply #2 on: February 25, 2014, 09:03:34 am »
If it has been finished with Polyurethane, that may be the cause of the yellowing.
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malcolmfrary

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Re: yellowed plastic help
« Reply #3 on: February 25, 2014, 09:52:08 am »
If white plastic has gained a suntan, it is likely to be more than skin deep.  Bleach might restore the whiteness, but there is the probability that it won't be quite the same plastic afterwards.  A new paint job is probably the best way.  As long as the result is a durable finish, there is no real "best".  The final result is most affected by the preparation.
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Raymond

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Re: yellowed plastic help
« Reply #4 on: February 25, 2014, 10:10:09 am »
How about one of those cleaners that you can use to whiten up modern plastic window frames and sills
           
                        Ray
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RAAArtyGunner

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Re: yellowed plastic help
« Reply #5 on: February 25, 2014, 10:29:10 am »
Quote from: fullboat on February 25, 2014, 08:38:09 am
Ive always found that plastic is cleaned well with diluted floor   cleaner.
The one I use is called Handy Andy in Australia.
I think it is an Ammonia based cleaner non abrasive, just liquid.

Andy

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black magic racing

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Re: yellowed plastic help
« Reply #6 on: February 25, 2014, 11:29:35 am »
A very quick fix really O0  use a little bit of toothpaste on a damp cloth and rub gently,wipe of with a clean damp cloth  :-))
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Martin (Admin)

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Re: yellowed plastic help
« Reply #7 on: February 25, 2014, 02:57:50 pm »

If the material is Plastic, careful, yellowed plastic can get very brittle!!
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wee speug

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Re: yellowed plastic help
« Reply #8 on: February 25, 2014, 07:18:55 pm »
i,ve got a yellow plastic duck and thats not brittle..... {-)
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spooksgone

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Re: yellowed plastic help
« Reply #9 on: March 04, 2014, 09:20:39 am »
And I have a little yellow submarine that's ok too. Makes bath time a lot of fun! :-)
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Colin Bishop

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Re: yellowed plastic help
« Reply #10 on: March 04, 2014, 09:37:25 am »
Martin said yellowed not yellow!

Yellowing of previously white plastic does indicate that the material is beginning to break down. This is often caused by the UV in sunlight but can be just the inherent nature of a material which is made from hydrocarbons. As has been discussed on other topics in the past, it is a moot point just how long the plasticard in our models will last. Todays materials are better than the first examples of plasticard which often only seemed to last a few years but I suspect that many of the models we are building now will self destruct eventually which is why I prefer to use wood where possible. If you do use plasticard, or indeed any form of plastic then it is wise to paint it to protect it from UV.

Colin
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Subculture

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Re: yellowed plastic help
« Reply #11 on: March 04, 2014, 05:14:30 pm »
Paint it as Malcolm advised. This will shield it from UV, which will go a long way to preventing further degradation.
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discovery man

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Re: yellowed plastic help
« Reply #12 on: May 19, 2014, 08:41:21 pm »
I use tfr...traffic film remover..on every thing..from cars to upvc..brings plastic up like new...great on engines too..its not too harsh on cleaning..and it seems to stay clean allot longer...
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Stavros

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Re: yellowed plastic help
« Reply #13 on: May 19, 2014, 09:31:32 pm »
TFR can Yellow white plastics and casue paintwork dammage especially on White paint use it sparingly.....
 
 
Dave
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discovery man

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Re: yellowed plastic help
« Reply #14 on: May 26, 2014, 01:16:26 pm »
i use tfr on most things....my mate is in the motor trade..he got a landrover freelander in..it had been used for transporting party ponies..small ponies..but when the freelander stoped working..it was used to to keep them in...lol..car was in a mess...turbo had blown.oil every where...plus straw,mud,and every thing every where..within a day or two.it was repaired,and cleaned out with tfr..it looked new lol...so he gave me 5 gallon to try out....its great on pond pumps.but clean it off with loads of water before putting back in the water...i use in the washing machine..just a small amount..me clothes feel softer..and no lime scale...i put a bit in my steam cleaner also..also removes lime scale..spiders hate lol.and they dont come back lol..funny..my wife calls it wonder fluid..she used 5 gallon within a few days lol...cleaned every thing..kept her out of my hair for days.lol so i keep it stocked up.ha ha he he lol they love it women ..leaves me to do what i want..or nag nag nag...their always on about decorating lol..........or my shed in a mess lol...........
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nemesis

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Re: yellowed plastic help
« Reply #15 on: July 07, 2014, 07:22:04 pm »
Hi, going along with Colin Bishop, I was talking to a very good modeller a while back and he will not used plasticard or similar. Being a retired industrial chemist he stated that the approx life is 20years. Have you ever wondered why items drop off for no good reason. I always paint the inside as well to keep the air off the joints, hope it helps, nemesis
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