Painting Acrylic

Paul Dimaline · 8th April 2006, 07:28 AM

I have made a TT sub-chassis out of some clear Perspex and would like to paint it, probably black. Can I just use an acrylic top coat or should I use an undercoat aswell.
It is only going to be a working prototype but I would like a decent finish.
Google just brings up artist materials and the only manufacturers site I found just said use a suitable paint (!), anyone any ideas?

TIA,
Paul.

AndrewT · 8th April 2006, 08:19 AM

Hi,
I think you will need a key for most paints to stick.

Some may have a solvent that interacts with the acrylic and thus produce a key.

Arcylic is available in black.

Do you have any offcuts you could experiment with, 600/1200 wet or dry silicon carbide paper will give a very fine keyed surface but use wet and ensure you and your working surfaces are clean to avoid scratching.

Do you realise you can polish your cut edges? progressive wet/dry followed with an abrasive brass polish.

Paul Dimaline · 8th April 2006, 06:23 PM

Cheers Andrew,

I dont know if I was imagining it but I was sure I read on here that someone "glued" 2 bits of acrylic together using acrylic paint. Needless to say I cant find the post now. Thats why I wondered if I could just use top coat, perhaps it reacts with the plastic??

infinia · 8th April 2006, 07:37 PM

artists use acrylic gesso as a primer usually white but can get black too. Very rough when dry so must be sanded to desired smoothness.

AndrewT · 8th April 2006, 08:10 PM

Hi,
acrylic paint is a water based paint. It will have little solvent content. I suspect it will not react with an acrylic sheet.
But worth trying.

KBK · 8th April 2006, 08:21 PM

if you want the coatings to adhere well..and realtively permanent..then rough the plasic up with 600 grit or better. jsut rnough to say the surface is 'micro' roughed. Make sure it is clean of oils. and yes, acrylics are usually a 'water based' coating.

Paul Dimaline · 8th April 2006, 10:21 PM

Cheers Guy's, I didnt realise it was water based. perhaps I am thinking of 2 pack acrylic auto paint...that has plenty of nasty chemicals in it.

I suppose I could also try enamal paint, as used on plastic model kits. I used model glue to stick the 2 bits together.

I'll have root around the shops tommorow and report back.

Paul.

8th April 2006, 07:28 AM	#1
Paul Dimaline diyAudio Member Join Date: Feb 2004 Location: Lincolnshire, UK	Painting Acrylic I have made a TT sub-chassis out of some clear Perspex and would like to paint it, probably black. Can I just use an acrylic top coat or should I use an undercoat aswell. It is only going to be a working prototype but I would like a decent finish. Google just brings up artist materials and the only manufacturers site I found just said use a suitable paint (!), anyone any ideas? TIA, Paul.

8th April 2006, 08:19 AM	#2
AndrewT diyAudio Member Join Date: Jul 2004 Location: Scottish Borders	Hi, I think you will need a key for most paints to stick. Some may have a solvent that interacts with the acrylic and thus produce a key. Arcylic is available in black. Do you have any offcuts you could experiment with, 600/1200 wet or dry silicon carbide paper will give a very fine keyed surface but use wet and ensure you and your working surfaces are clean to avoid scratching. Do you realise you can polish your cut edges? progressive wet/dry followed with an abrasive brass polish. __________________ regards Andrew T.

8th April 2006, 07:37 PM	#4
infinia diyAudio Member Join Date: May 2005 Location: Californication	artists use acrylic gesso as a primer usually white but can get black too. Very rough when dry so must be sanded to desired smoothness. __________________ like four million tons of hydrogen exploding on the sun like the whisper of the termites building castles in the dust

8th April 2006, 08:10 PM	#5
AndrewT diyAudio Member Join Date: Jul 2004 Location: Scottish Borders	Hi, acrylic paint is a water based paint. It will have little solvent content. I suspect it will not react with an acrylic sheet. But worth trying. __________________ regards Andrew T.

8th April 2006, 08:21 PM	#6
KBK diyAudio Member Join Date: Dec 2003 Location: The Wilds Of Canada	if you want the coatings to adhere well..and realtively permanent..then rough the plasic up with 600 grit or better. jsut rnough to say the surface is 'micro' roughed. Make sure it is clean of oils. and yes, acrylics are usually a 'water based' coating. __________________ "Never forget that only dead fish swim with the stream." -- Malcolm Muggeridge. "Truth cannot be brought down, rather the individual must make the effort to ascend to it." -- Jiddu Krishnamurti


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8th April 2006, 06:23 PM	#3
Paul Dimaline diyAudio Member Join Date: Feb 2004 Location: Lincolnshire, UK	Cheers Andrew, I dont know if I was imagining it but I was sure I read on here that someone "glued" 2 bits of acrylic together using acrylic paint. Needless to say I cant find the post now. Thats why I wondered if I could just use top coat, perhaps it reacts with the plastic??

8th April 2006, 10:21 PM	#7
Paul Dimaline diyAudio Member Join Date: Feb 2004 Location: Lincolnshire, UK	Cheers Guy's, I didnt realise it was water based. perhaps I am thinking of 2 pack acrylic auto paint...that has plenty of nasty chemicals in it. I suppose I could also try enamal paint, as used on plastic model kits. I used model glue to stick the 2 bits together. I'll have root around the shops tommorow and report back. Paul.

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