Nigel.D

Do Not Reat DO NOT use washing up liquid !!!!!! it breaks down the pigments over time and causes light refraction !! if you need to get rid of surace tension on anything use a dishwasher rinse aid its dirt cheap and is the best wetting agent money can buy (sorry Barry but wash up liquid nowdays is so full of surficants that it breaks down) and causes no end of probs

wonwinglo

Thanks Nigel for that correction,dishwasher rinse it is then,in fact it will come in handy for various jobs.
That will explain the warnings for people,not to use it to clean their vehicles with it either ?

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rjwood_uk

can someone please explain what is ment by "wetting" and "surface tension" and how it works/how to do it.

also if i get some rinse aid does it matter that it has lemon francrance in it?

thanks

rjwood_uk

well i have tested and tested and finaly got the right shade (well at least it will be once i build up enough layers!) now all i need to do is know what all this "wetting" and stuff is.

...or does it not really matter?

Richard

wonwinglo

RJ,the term 'wetting out' refers to the surface tension generated on things like plastic etc,have you ever noticed what happens when you try to apply acrylic paint sometimes to plastic ? it sort of disperses because of the surface tension on the plastic,a wetting agent is something that gets rid of the tension prior to painting,you may have got away with it on your canopy but it can present a problem sometimes.

__________________
'And there I was oil on my goggles from a broken pipe,then I looked at the altimeter,all I could see was the makers name !'
www.wonwinglo.scale-models.net/

rjwood_uk

thanks for that Barry. i thought it may have been that but wanted to make sure.

so how do i go about "wetting" it. do i put some rinse agent on it and then spray it? or do i have to wash the rinse agent off?

wonwinglo

RJ,if you are not getting any problems with separation then leave it out,if you do need to wet out anytime then just spray on the solution and wipe clean with a lint free cloth,this will have effectively broken the surface tension just prior to painting the canopy.
If you ever need to experiment to see how surface tension works,then drop some of the solution into a container full of water,watch how the water is displaced as the tension disperses on the surface,that in a nutshell is how surface tension behaves.

__________________
'And there I was oil on my goggles from a broken pipe,then I looked at the altimeter,all I could see was the makers name !'
www.wonwinglo.scale-models.net/