Spray Paint - How do I stop a crackling effect...? - Page 2

tourerfogey · 3rd March 2008, 12:48

Quote:

Originally Posted by T-Cut

Crackling is caused when the solvent in the new paint softens/incompatible with the resins in the existing finish. The only way to overcome this is to experiment with alternative paints or remove the existing layer. In any case, it's likely to be pot luck.

TC

T-Cut · 3rd March 2008, 18:41

It's possible that the plastic itself is incompatible with the solvent in your paint. Different finishes on different plastics make it a bit of a mine field.

TC

The_Monk · 13th March 2008, 19:54

Well i've tried every combination I can think of and im still getting completely random results!! What works on one piece doesnt work on another, if its not the primer reacting with the paint its the plastic. Out of my dash I currently have 3 acceptable pieces lol! Gear Surround (in the wrong colour mind as I changed my mind) the button plinth, and ashtray cover!

I'm almost ready to give up, I may sand it all back down and take it somewhere and beg them to paint it for me!

Simon · 13th March 2008, 19:56

Have you considered other methods for coating the surface? For example, vinyl wraps or even plastic-coating?

The_Monk · 13th March 2008, 20:06

Not thought about anything else, a vinyl wrap might be plausible just depends how well I can stretch it around the curves. I have some offcuts of vinyl so might try a section to see.

Sorry to sound dumb but what is plastic coating?

The_Monk · 13th March 2008, 20:09

Ah its ok I googled it!

Simon · 13th March 2008, 20:19

Quote:

Originally Posted by The_Monk

Ah its ok I googled it!

Good ol' Google

The_Monk · 13th March 2008, 20:22

Thanks for the advice Simon I think I'm going to try and vinyl wrap it for it my next trick!! Just got to find an appropriate shade now! lol

gerry3 · 14th March 2008, 23:02

Quote:

Originally Posted by The_Monk

Well i've tried every combination I can think of and im still getting completely random results!! What works on one piece doesnt work on another, if its not the primer reacting with the paint its the plastic. Out of my dash I currently have 3 acceptable pieces lol! Gear Surround (in the wrong colour mind as I changed my mind) the button plinth, and ashtray cover!

I'm almost ready to give up, I may sand it all back down and take it somewhere and beg them to paint it for me!

Could I sugest that you pay a visit to your local model shop.I think they will have a primer which will seal the surface. Model planes have plastic parts which need painting and I have used it on my models with very good results

3rd March 2008, 18:41	#12
T-Cut This is my second home Rover75 and Mreg Corsa. Join Date: Nov 2006 Location: Sumweer onat mote o'dust (Sagin) Posts: 21,753 Thanks: 341 Thanked 3,660 Times in 2,924 Posts	It's possible that the plastic itself is incompatible with the solvent in your paint. Different finishes on different plastics make it a bit of a mine field. TC

13th March 2008, 19:54	#13
The_Monk I really should get out more....... - Join Date: Nov 2006 Location: - Posts: 2,586 Thanks: 0 Thanked 3 Times in 2 Posts	Well i've tried every combination I can think of and im still getting completely random results!! What works on one piece doesnt work on another, if its not the primer reacting with the paint its the plastic. Out of my dash I currently have 3 acceptable pieces lol! Gear Surround (in the wrong colour mind as I changed my mind) the button plinth, and ashtray cover! I'm almost ready to give up, I may sand it all back down and take it somewhere and beg them to paint it for me!

13th March 2008, 19:56	#14
Simon Banned - Join Date: Nov 2006 Location: - Posts: 10,318 Thanks: 0 Thanked 4 Times in 3 Posts	Have you considered other methods for coating the surface? For example, vinyl wraps or even plastic-coating?

13th March 2008, 20:06	#15
The_Monk I really should get out more....... - Join Date: Nov 2006 Location: - Posts: 2,586 Thanks: 0 Thanked 3 Times in 2 Posts	Not thought about anything else, a vinyl wrap might be plausible just depends how well I can stretch it around the curves. I have some offcuts of vinyl so might try a section to see. Sorry to sound dumb but what is plastic coating?

13th March 2008, 20:09	#16
The_Monk I really should get out more....... - Join Date: Nov 2006 Location: - Posts: 2,586 Thanks: 0 Thanked 3 Times in 2 Posts	Ah its ok I googled it!

13th March 2008, 20:22	#18
The_Monk I really should get out more....... - Join Date: Nov 2006 Location: - Posts: 2,586 Thanks: 0 Thanked 3 Times in 2 Posts	Thanks for the advice Simon I think I'm going to try and vinyl wrap it for it my next trick!! Just got to find an appropriate shade now! lol