Aaaarrrgh - Help with paint.

[Shawn R. L.]

This is happening intermittently. Seems to only happen on resin parts....but not all of them. The base resin parts are smooth. These bubbles appear INSTANTLY when spraying. More paint dosn\'t help either.

I\'ve had this problem a little bit in the past but NEVER like this. If it matters, this is odorless resin being used. Something I haven\'t used much.

 

[BarstoolProphet]

I don\'t know much about resin, myself, but if I had to guess (and I really don\'t, but I\'m going to, anyway), I\'d say that sort of thing comes from resin being kind of porous, and when you cover it with the thin coat of liquid, little air bubbles come out of the resin.
Try doing more of a dusting than a full covering with the spray?

 

[War Griffon]

I don\'t agree with Barstool

I have seen a simular effect when hand painting metal and it is down to grease or oil on the surface where it hasn\'t been cleaned off properly.

In the case of resin it may well be the mold release having not been cleaned off. I find this hard to believe though from somebody of your experience Shawn so it might be worth looking deeper.

Did you cast it yourself?
Is there a problem with the resin itself that has been used i.e. was it mixed correctly has it set correctly?

 

[Shawn R. L.]

@War Griffon - Yes, I have encountered this in the past but this seems to be especially bad. Using odorless resin is fairly new to me.....any experience with priming that stuff?

One of the odd things about this too is that most of the parts in the same batch don\'t do this. Could a mix that\'s just a touch off the optimum percentages do this. It\'s also strange that it\'s instant. Not like a good coat that developes these.

I got out of the habit of washing the resin stuff because it didn\'t seem to make any difference. I did have some problems way back with what we called \'fisheyes\' which were larger, sort of, spots, not bubbles.

No, I didn\'t cast this. The fellows at Armorcast did.

 

[Legacy Account]

Is it bubbles in the paint, or is the paint actually eating into the resin and pitting it?

 

[Neil H]

My immediate reaction was that you were spraying too close or had not shaken up the can properly. But reading into it I reckon its a reaction to contamination in/or in the resin. Forgewirold pieces can suffer from this (not so extreme) as they use a lot of releasing agent to knock out pieces quicker.

Only thing to do is scrub the castings thoroughly.

Neil

 

[Dragonsreach]

Originally posted by Shawn R. L.
These bubbles appear INSTANTLY when spraying. More paint dosn\'t help either.

Ooops just read this line.
Your answer is in this it has to be a reaction between the primer and the resin.
From what you\'ve said I\'d suggest that its the same type of reaction to the propellant that polystryene foam has.

I\'m not familiar enough with resin to discuss what odourless is or it\'s components, but I\'m wondering if there is an amount of tiny air bubbles close to the surface that the paint/propellant is eroding/popping the bubbles skin and causing this issue.

Edit: messed up my edit and lost my original comments :cussing:
I\'d suggested several possible things one of which was priming in high humidity/rain. I\'ve had primer absorb Drizzley rain in the journey between Garage and house.

 

[Neil H]

Snap with the drizzle scenario!!:cussing:

N

 

[Infidel Castro]

As an aside, it could be quite good for weathering and rust/corrosion effects. No idea what causes it though.

 

[freakinacage]

interesting pic there shawn....it looks steam punk!!

 

[Shawn R. L.]

Originally posted by Dragonsreach
Ooops just read this line.
Your answer is in this it has to be a reaction between the primer and the resin.
From what you\'ve said I\'d suggest that its the same type of reaction to the propellant that polystryene foam has.

This is a different brand of paint than I\'ve used before. My brother mentioned it may be due to cheap paint (bad habit of mine).

@freakinacage :yes:....soon......................soon............

 

[waghorn41]

From the photo it looks to me like the paint is applied too heavily and has trapped air underneath which then breaks out. I\'ve had similar effects occassionally. Just my 2 cents anyways.