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does this symptom have a name?


nmsmith
08-22-2004, 11:22 AM
Following forum advice from Primera Man's very helpful HOW-TO on spraying mist coats 3-4 Coats of finish coat about 5-10 minutes apart....thats it...nice a simple.(keep the can warm) I got the following wrinkly surfaces:
http://www.nicksmith.org/body1.jpg
http://www.nicksmith.org/body2.jpg

As far as I can tell this is certainly not orange-peel-like in appearance. So, err, what is it? Does a surface like this have a name?

This body was first painted with a white enamel primer which had fully dried for a day or so. Now I was using Tamiya's TS-26 white spray can, doing a second mist coat 10 minutes after the first. I have never had the same symptoms when airbrushing acrylics 5-10 minutes apart, so this surprised me.

I don't intend to sully P-man's reputation . . . I'd just like to know how I messed up.

Is my mistake that I assumed these lacquer spray cans can go on as frequently as acrylics? Do they need longer to dry?

And more importantly, how should I remedy this surface effect? As this was during a fairly light mist coat, will a wet coat cover it up? Or is it back to square one?

Thanks for any advice,

Nick

spidereddie
08-22-2004, 11:28 AM
possibles

1.tamiya spray over enamel is a no- no
2. Looks like it might also not have been preped/cleaned well enough

minniebanister
08-22-2004, 11:34 AM
http://www.briansmodelcars.com/tutorials/tutorial.asp?TutorialID=30&CurPage=1

Your problem looks somewhat like the "lifting" picture.

papa_G
08-22-2004, 11:36 AM
And more importantly, how should I remedy this surface effect? As this was during a fairly light mist coat, will a wet coat cover it up? Or is it back to square one?

Thanks for any advice,

Nick

PAINT COVERS NOTHING!!!
back to the beggining

scaleracecars
08-22-2004, 11:49 AM
PAINT COVERS NOTHING!!!
back to the beggining

This is what happens when you apply a lacquer over enamel. The only way to fix this is to strip the model and start over with a good primer. Tamiya, Gunze, MM new lacquer primer are best because they are much smoother that auto store spray can primers. I know a lot of people swear by the auto store spray primers but they do not lay down as smooth as the dedicated model lacquer primers. The smoother surface these primers give means it will take less paint to cover and these dedicated primers almost never have a reaction to the plastic like other primers do.
David
http://www.scaleracecars.com

Tikiman
08-22-2004, 11:53 AM
Looks like a simple compatibility problem.

SnakekanS
08-22-2004, 11:59 AM
possibles

1.tamiya spray over enamel is a no- no
2.Looks like it might also not have been preped/cleaned well enough
exactly, enamel and lacquer react very badly when mixed together

willimo
08-22-2004, 12:11 PM
Mostly lacquer on top of enamel is a problem, as enamels don't really ever dry, while lacquer does. The enamel tries to keep gassing out, but the lacquer doesn't let it, thus the reaction problem. (Right?)

nmsmith
08-22-2004, 12:30 PM
Well with that in mind, I guess I strip the paint using isopropyl alcohol, and try again.

Thanks everyone for the diagnosis, irritating though it is!

But what sort of primer is the one to use? Tamiya don't seem to list one. Or at least online shops here in the UK don't seem to. Is it safe just to spray directly onto the plastic?

(Why oh why didn't I think about this compatibility before I tried this one?)

thanks still,

Nick

minniebanister
08-22-2004, 01:09 PM
Well with that in mind, I guess I strip the paint using isopropyl alcohol, and try again.


Isopropyl alcohol is not strong enough to strip the enamel paint. Oven cleaner will do the job and not harm the plastic.

Vric
08-22-2004, 02:15 PM
misng Enamel and Lacquer did that.

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