Chrispy":zlo3eum5 said:BugBear the lettering is about 25mm high.
Conrad Hoffman":zlo3eum5 said:I too am looking for the magic wrinkle recipe. I restore old electronic equipment, particularly old General Radio Corp. test equipment. Their early black and dark gray finishes have an unusual quality, not a fine wrinkle, but large irregular flat areas about a tenth of an inch in diameter, with lower height lines separating them. Hard to describe, but not a fine wrinkle. I believe it was chemical, since the wrinkle extends around the edges of the panels. It wouldn't if they used a texture screen or mechanical means. How how how did they do this. Since they used this finish from the '30s to the '60s or later, it couldn't have been any great secret. An additive? Baking? Some special spray technique? Help!
Wrinkling, Webbing, Frosting and Gas Checking
Wrinkling is the development of wrinkles in the paint film as it dries, usually due to the formation of a skin. Defects similar to wrinkling are webbing, frosting and gas checking. Webbing is the development of wrinkles, usually in a well defined pattern and if it occurs in an oven it is called gas checking. Frosting is the formation a haze which is due to fine wrinkles and it occurs in gas fired drying ovens.
The causes can be:
- Due to the paint's being applied too thick, especially with high oil-length alkyds, varnishes with wood oil and too much cobalt drier, enamels based on alkyd or phenolic resins with drying oils and black enamels containing bitumen.
- Stoving paints containing bitumen.
- Frosting may be due to the products combustion in the oven reacting with the surface of the film or may be due to high humidity.
- Too much cobalt drier.
Sometimes the wrinkle pattern may be induced into the paint to produce films that will hide surface defects.
Another type of defected related to wrinkling are crocodiling or alligatoring where the wrinkle pattern resembles the hide of one of these reptiles.
Terry - Somerset":1er7c7kl said:You could have a look at the textured paint in B&Q etc. Some years ago I made a fireplace surround which I coated with a spray stone effect. Not identical but similar. Could overspray with colour of your choice.
It's also very similar to the "crackle" paint used on old MGBs - apparently some people use black plastikote wrinkle paint.
Good luck
Terry
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