Enamel paint wrinkling

[197.]

Right guys so I set about painting front and rear nearside calipers and they came out great, or so I thought. Calipers were cleaned with brake cleaner, scotchbrite pad was used so the paint would adhere better and gloves worn so I didn't get any oil on any surfaces. Light coats were painted every 30 mins as the temperature was 20 degrees. The paint looked fine for the first couple of days and had cured fine, however a week later it's crinkled on the front (around and on top of the pistons) yet the rear caliper is fine.

Just been out to take a few photos and the paint on the front caliper has gone soft. I'm guessing the heat resistance of the paint is the issue, but would be grateful for any advice.

Before:

After:

 

[197.]

So after some research it turns out that I most likely didn't leave enough time between coats. I'll probably just be rubbing the affected areas with a scotchbrite pad and painting over them again, but with at least an hour between coats. Hopefully end up with a decent finish to which I can apply the brembo decal on top of. As much as i'd like a perfect finish, I haven't got the skill nor patience and it's not bad for a £6 tin of paint. I'll keep the thread updated for anyone else who may manage to mess up something so simple, like I have!

 

[Mr Plums]

What was the weather like when you did your spraying and what environment did you spray in?

Did you leave the paint to harden long enough before you drove it?

I have never had this problem, smooth hammerite ftw

 

[197.]

It was cloudy during the first two coats, but then sunny afterwards. It was a little windy but any contamination introduced by the wind would have come up as small bubbles, and there's none of those. I left the paint to cure for near enough 36 hours. It said 24 on the tin but I just wanted to be sure. I guess that'll teach me to buy paint of ebay eh! Although I should mentioned I applied the paint with a brush.

I've still got the offside calipers to paint tomorrow, fingers crossed they come out a little better.

 

[Pacman.]

That's something called orange peel.
It's where you have put too much on too quickly.

 

[197.]

That's something called orange peel.
It's where you have put too much on too quickly.

Cheers, I wasn't sure if it was orange peel or not. It was the following links from where I learnt my mistakes:
https://books.google.co.uk/books?id...AQ#v=onepage&q=enamel paint wrinkling&f=false
http://modeltech.tripod.com/paintprobs.htm

Guess it's all part of the learning curve though.

 

[Pacman.]

Yeah sometimes the heat and humidity also affects it.

Had to spend a year in RAF training learning how to paint aircraft and parts. Orange peel is just one of those things.

 

[197.]

Yeah sometimes the heat and humidity also affects it.

Had to spend a year in RAF training learning how to paint aircraft and parts. Orange peel is just one of those things.

Was there any anti radar paint applied too to aircraft in the RAF or is it mostly an american thing?

 

[Pacman.]

No the Anti Radar paint you are thinking of is only for the F117 and the B2. It is called Radar absorbent Material and has to have a special hanger and process to apply it. The make up of it is still highly secret. If you are ever at RAF Fairford and see the brown clam like hangers they are the special paint bays for it.

We had something called Infra Red Reflective paint that was applied to the vehicles and aircraft or solar heat reflective paint. But never that RAM stuff.

 

[Chrisgti6]

Any pics of what they look like?

 

[Pacman.]

The hangers look like that. They are special B2 servicing hangers.


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[Pacman.]

What you need to do when repainting the brakes is wait until the surface is tacky but the paint does not stick to your finger. Then you know that it is ready for the next coat.


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[Chrisgti6]

The hangers look like that. They are special B2 servicing hangers.


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Sorry I meant pictures of the calipers.

 

[197.]

Sorry I meant pictures of the calipers.

Yes mate, for some reason they show up on my browser but not in incognito mode. Must be something to do with the permissions.