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Re: Sanding Car ready for Paint
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Home away from home
 
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So do you agree that Water bourne paints have a better finish ?
Posted on: 2010/12/30 16:27
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Re: Sanding Car ready for Paint
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Home away from home
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If they have a better finish it is because they are covered with old fashioned chemical based clearcoat. In a waterborne system the primer and clear are chemical, only the color coat is waterborne.
A straight paint job without clear uses chemical solvents so it comes to the same thing as far as pollution.
Posted on: 2010/12/30 17:07
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Re: Sanding Car ready for Paint
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Forum Ambassador
 
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Quote:
No car company could afford to use nitrocellulose lacquer in the fifties. It was just too expensive and labor intensive. As I said before, the only cars I know that got that finish, were special order custom built Chrysler Imperial limousines, that were finished at the Derham custom body works. The Chrysler factory did not have the facilities. Points of fact (from DuPont's own website): * DUCO was Dupont's tradename for their nitrocellulose lacquer * DULUX was their tradename for their alkyd enamel * DuPont's Lucite? automobile finish lacquers were first marketed commercially in 1956. Last but not least, all the DuPont paint chip sets that we have on file at PackardInfo for Packards of the 1950s show DUCO through 1957. Beginning in 1953, the chip sets included a note that DULUX formulas were also available.
Posted on: 2010/12/30 18:45
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Re: Sanding Car ready for Paint
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Home away from home
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DUCO was Dupont's tradename for their nitrocellulose lacquer
Was this the same nitrocellulose lacquer that had to be built up coat by coat then wet sanded and polished? Or was it the improved formula that was more durable and easier to apply? The original question was about how hard it is to refinish over the original paint on a 54 Packard. My position is that it should not be a problem. The paint they used then was not as finicky as the hand rubbed lacquer which was prone to cracking. Pyroxilin and nitrocellulose are similar materials so just the name pyroxilin or nitrocellulose does not tell the whole story.
Posted on: 2010/12/30 19:02
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Re: Sanding Car ready for Paint
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Forum Ambassador
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Yes, DUCO was a refined nitrocellulose lacquer, introduced in 1922.
Yet, you had previously stated, in post #60 of this thread: Quote: I seriously doubt Packard was using nitrocellulose in the fifties. My guess is they used synthetic enamel like everyone else. Then, you open with the statement, in post #63 of this thread: Quote: No car company could afford to use nitrocellulose lacquer in the fifties. ...and later go on to say that... Quote: I believe the pyroxilin synthetic enamel was the standard finish before the acrylics (enamel and lacquer) came along in about 1955. My intent is not to quote you out of context, but these statements give the impression that Packard was using acrylic enamel or lacquer in the 1950s, which is not the case.
Posted on: 2010/12/30 19:15
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Re: Sanding Car ready for Paint
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Home away from home
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The V8 parts books list exterior lacquer colors, and interior paint an air drying enamel, page XII & XIII.
The 22nd thru 54th does not say lacquer for exterior, but does list air drying enamel for the interior, page XVI & XVII. Why did they use both? Different paint for different protection of the painted surfaces? A harder gloss shine on the outside and a muted tone on the inside?
Posted on: 2010/12/30 22:19
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Re: Sanding Car ready for Paint
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Forum Ambassador
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Which would be more durable? I think lacquer is harder and easier to scratch or chip but does have a deeper luster. Isn't enamel a thicker coat -- wonder if they used enamel on the inside because it might wear better or maybe not need much upkeep.
Posted on: 2010/12/30 22:43
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Howard
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Re: Sanding Car ready for Paint
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Home away from home
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So on show cars, what do people tend to use? And is it just a question of many coats of paint to achieve that show look?
Posted on: 2010/12/31 10:55
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Re: Sanding Car ready for Paint
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Home away from home
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So are you going for a show car or nice driver? Makes a world of difference, at least double the cost.
Most painting pros I know think that organic based paint has superior finish to waterborne paint. It will be a moot point soon, though.
Posted on: 2010/12/31 11:11
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56 Clipper Deluxe survivor
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