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bnn(at)nethere.com
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Posted: Sat Feb 04, 2006 6:58 pm Post subject: Two Questions

1. I have some steel fittings to connect my bubble door gas springs to the 

doors and frames. What kind of preparation is required to paint steel? It 

appears part of the fitting is chromed. Is there a way to tell? (I welded 

purchased ball end plates to some 4130 tube. The purchased plates are 

shiny, but I'm not sure they're chromed.) If chromed, how do I prep for paint?



2. Does anyone have a source for painting in San Diego? I've been trying to 

clear coat my instrument panel and center console with disastrous results. 

(No clean room.) Would anyone care to recommend a paint shop for a small 

clear-coat LP job?



Thanks,

Guy Buchanan

K-IV 1200 / 582 / 99.9% done, thanks mostly to Bob Ducar.

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wingsdown(at)comcast.net
Guest

Posted: Sat Feb 04, 2006 8:02 pm Post subject: Two Questions

Just make a cardboard box big enough to cover the panel between coats. 



Rick



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ddsyverson(at)comcast.net
Guest

Posted: Sun Feb 05, 2006 1:28 pm Post subject: Two Questions

Guy,



Prepping steel is pretty much a matter of being sure: 1) there is no foreign 

matter on the surface such as oil, grease, silicon (the worst)  or wax and; 

2) roughing up the surface to provide sufficient tooth so paint will stick.



By far the best method that I have used is to sandblast a steel part (not 

recommended for aluminum). If that isn't an option, us a flexible abrasive 

wheel, sandpaper or something similar to roughen the surface so the paint 

will stick. For what it is worth, sandblasted chrome plating (I try real hard 

not to breath the dust - no - I make sure I don't!) works fine - I've done 

this with cars where an original chrome plating was to be refinished with 

paint to match the remained of the bodywork on a street rod. The only thing 

you have to make sure of with a plated part is to check it to be sure there 

are not any delaminated layers sticking up due to insufficient sandblasting 

or sanding - usually is not a problem, but look for it.



Getting the foreign material off is a matter of using the proper solvent to 

clean off the surface - do it before you sandblast/sandpaper and again after. 



I also like to finish off any metal work with a phosphoric acid wipe/rinse 

prior to painting. This is the stuff we know as "metl-prep" for autobody and 

a similar product is provided through poly fiber for etching metal. I think 

the polyfiber product also uses a bit of hydrofloric acid in their metal etch 

product.



Good luck.



Dave S

St Paul, MN



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On Saturday 04 February 2006 8:47 pm, Guy Buchanan wrote:

 	  Quote: 	
		   



 1.   If chromed, how do I prep for

 paint?



  

 Thanks,

 Guy Buchanan

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bnn(at)nethere.com
Guest

Posted: Mon Feb 06, 2006 6:45 pm Post subject: Two Questions

At 01:16 PM 2/5/2006, you wrote:

 	  Quote: 	
		  This is the stuff we know as "metl-prep" for autobody and

a similar product is provided through poly fiber for etching metal.


	


Thanks Dave,

         I've got Metl-prep, and I think I can rent a portable sandblaster 

locally. That might be the best way to do it.

Guy Buchanan

K-IV 1200 / 582 / 99.9% done, thanks mostly to Bob Ducar.



Do not archive

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bnn(at)nethere.com
Guest

Posted: Mon Feb 06, 2006 6:45 pm Post subject: Two Questions

At 07:59 PM 2/1/2006, you wrote:

 	  Quote: 	
		  



Just make a cardboard box big enough to cover the panel between coats.


	


Thanks Rick, but I got most of my foreign objects during spraying. I did it 

in the garage with the floor wet and all, but did not even try to fabricate 

a spray booth. I guess I could to the plastic sheet over PVC thing. I'll 

see how much a local shop wants to do the paint, first.

Guy Buchanan

K-IV 1200 / 582 / 99.9% done, thanks mostly to Bob Ducar.



Do not archive

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