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Finishing Alclad

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  • Member since
    August, 2015
  • From: Sidmouth, Devon, UK
Finishing Alclad
Posted by Simon Newell on Wednesday, May 22, 2019 2:12 PM

I've pretty much finished spraying Alclad Chrome onto a model exhaust pipe but it's still a little dull.  I want a brighter, gloss, finish.  Previous attempts to polish have just resulted in removing the paint, necessitating rework. It's had four or five layers now.

Anybody got any recommendations for a lacquer or varnish treatment which won't craze?

 

Simon Newell

Devon, England

  • Member since
    September, 2012
Posted by GMorrison on Wednesday, May 22, 2019 2:22 PM

Yeah, I know that one. Clear gloss acrylic sort of works.

I have decided the only way to get anything approaching a chrome shine is to prime, sand and prime again with a hard gloss enamel.

  • Member since
    August, 2014
  • From: Willamette Valley, Oregon
Posted by goldhammer on Wednesday, May 22, 2019 3:11 PM

For a shiny chrome finish, might try a Molotow Liguid Chrome pen.

  • Member since
    January, 2013
Posted by BlackSheepTwoOneFour on Wednesday, May 22, 2019 3:13 PM

GMorrison

Yeah, I know that one. Clear gloss acrylic sort of works.

I have decided the only way to get anything approaching a chrome shine is to prime, sand and prime again with a hard gloss enamel.

 

My thoughts exactly. Did you prime with gloss black first? Don’t use Alclad’s own gloss black base. There’s been some issues with their gloss black primer.

  • Member since
    August, 2015
  • From: Sidmouth, Devon, UK
Posted by Simon Newell on Thursday, May 23, 2019 2:11 AM

Thanks all. In my innocence I did use Alclad's own black gloss primer, two coats, and I was happy with the finish.  I did quite a lot of research on techniques before starting but did not see any criticism of that primer. However a hard lesson learned.  Maybe I can use an acrylic gloss to do something to the finished product.  Any brand recommendations?  Johnsons Klear maybe?

Simon Newell

Devon, England

  • Member since
    November, 2009
  • From: Twin Cities of Minnesota
Posted by Don Stauffer on Thursday, May 23, 2019 8:58 AM

The shine of the finish is highly dependent on the quality of the gloss black undercoat, and which alclad you use.  If you want a very mirror-like finish you must have an impecibly perfect black undercoat, and use the polished aluminum alclad.

Note that mill finish aluminum by itself does not have a mirror-like surface, so even when rolled out of the factory a production aircraft does not have a super sheen.  Museum and restored aircraft are polished to such a sheen.  In the past, when labor was cheaper, airliners and prototypes of military aircraft were polished.

Alclad makes three types of aluminum finish- the above mentioned Polished Aluminum, just plain Aluminum, which has a sort of semi-matt sheen, and a flat sheened aluminum called either white aluminum or airframe aluminum.

 

Don Stauffer in Minnesota

  • Member since
    June, 2017
  • From: Winter Park, FL
Posted by fotofrank on Thursday, May 23, 2019 10:20 AM

I use Tamiya gloss clear over Alclad Aluminum. It gives a reasonable shine without too much gloss. The shine looks more to scale than a real high gloss finish.

OK. On the bench:

Way too much to build in one lifetime...

  • Member since
    November, 2008
  • From: Central Florida
Posted by plasticjunkie on Friday, June 07, 2019 12:10 PM

Simon Newell

I've pretty much finished spraying Alclad Chrome onto a model exhaust pipe but it's still a little dull.  I want a brighter, gloss, finish.  Previous attempts to polish have just resulted in removing the paint, necessitating rework. It's had four or five layers now.

Anybody got any recommendations for a lacquer or varnish treatment which won't craze?

 

 

 

So I figure you mean auto chromed pipes? Then use Testors gloss black enamel in the small squared bottle and when dry then use Alclad Chrome over the gloss enamel but, you have to go easy spraying the Alclad cuz you want some of the black to peek thru to get the right metallic effect. Too much Alaclad will just dull the finish and look like silver paint.

 GIFMaker.org_jy_Ayj_O

 

 

Too many models to build, not enough time in a lifetime!!

  • Member since
    November, 2009
  • From: Twin Cities of Minnesota
Posted by Don Stauffer on Saturday, June 08, 2019 6:41 AM

plasticjunkie

 

 
Simon Newell

I've pretty much finished spraying Alclad Chrome onto a model exhaust pipe but it's still a little dull.  I want a brighter, gloss, finish.  Previous attempts to polish have just resulted in removing the paint, necessitating rework. It's had four or five layers now.

Anybody got any recommendations for a lacquer or varnish treatment which won't craze?

 

 

 

 

 

So I figure you mean auto chromed pipes? Then use Testors gloss black enamel in the small squared bottle and when dry then use Alclad Chrome over the gloss enamel but, you have to go easy spraying the Alclad cuz you want some of the black to peek thru to get the right metallic effect. Too much Alaclad will just dull the finish and look like silver paint.

 

plasticjunkie

 

 
Simon Newell

I've pretty much finished spraying Alclad Chrome onto a model exhaust pipe but it's still a little dull.  I want a brighter, gloss, finish.  Previous attempts to polish have just resulted in removing the paint, necessitating rework. It's had four or five layers now.

Anybody got any recommendations for a lacquer or varnish treatment which won't craze?

 

 

 

 

 

So I figure you mean auto chromed pipes? Then use Testors gloss black enamel in the small squared bottle and when dry then use Alclad Chrome over the gloss enamel but, you have to go easy spraying the Alclad cuz you want some of the black to peek thru to get the right metallic effect. Too much Alaclad will just dull the finish and look like silver paint.

 

Yes indeed! I should have mentioned this in my post above  For a mirror-like sheen you have to dial the paint flow on the airbrush way back and put it on slowly.  The thicker the Alclad PA coat, the less shiny it is. 

BTW, this can be used to get some variation panel to panel on an aircraft- make the whole thing shiny first coat.  When dry mask some panels and put a second coat on some panels- repeat if you want for even more variation.

 

Don Stauffer in Minnesota

  • Member since
    August, 2015
  • From: Sidmouth, Devon, UK
Posted by Simon Newell on Saturday, June 08, 2019 8:24 AM

Both those recommendations seem eminently sensible and I now understand the technique and the theory.  I just have to remember for the next time!

Simon Newell

Devon, England

  • Member since
    November, 2018
Posted by oldermodelguy on Saturday, June 08, 2019 8:32 AM

Will Alclad buff up like Model Master buffing Metalizer paints do ( I use those metalizer paints) ? I find if I clear coat any old black before spraying on very thin coats of Metalizer, then buff when dry it makes a very convincing and shiny metal finish. Plus you can mist in some dark blue or dark bronze here and there over the black before clear coating and those hues come through in the shine. The key is high gloss under the metal paint, thin coats, thinner the better of the metal paint and then buff to a shine trying not to rub through too much ( if it's a good shiny coat under the metal paint it takes very little buffing anyway).

I use a Badger 200, fine tip dialed way back, fairly low pressure and I use the metal color cup rather than a jar only 1/4 full or so, so I can swish it around to keep the metal suspended ( maybe that part isn't a problem with Alclad but with MMBM it is important). If you let the silver drop out you will get metallic silver paint lol.

  • Member since
    November, 2018
Posted by oldermodelguy on Saturday, June 08, 2019 8:41 AM

Simon Newell

Both those recommendations seem eminently sensible and I now understand the technique and the theory.  I just have to remember for the next time!

 

The good news is you can practice the various techniques described in this thread any time on some plastic spru trees. Just a thought.

  • Member since
    November, 2009
  • From: Twin Cities of Minnesota
Posted by Don Stauffer on Sunday, June 09, 2019 6:42 AM

oldermodelguy

 

 
Simon Newell

Both those recommendations seem eminently sensible and I now understand the technique and the theory.  I just have to remember for the next time!

 

 

 

The good news is you can practice the various techniques described in this thread any time on some plastic spru trees. Just a thought.

 

 

 

A lot of us keep a package of plastic spoons on hand to practice/test finishing methods.  They tend to be a little smoother- better finish than kit sprue.

Don Stauffer in Minnesota

  • Member since
    November, 2018
Posted by oldermodelguy on Sunday, June 09, 2019 7:23 AM

Don Stauffer

 

 

A lot of us keep a package of plastic spoons on hand to practice/test finishing methods.  They tend to be a little smoother- better finish than kit sprue.

 

I know Don ( I have a 1 gallon freezer bag full of empty prescription bottles I use myself) .  But my thought was spru would be more shaped like exhaust pipe. Plastic spoons are kind of like "the standard" though !

  • Member since
    November, 2008
  • From: Central Florida
Posted by plasticjunkie on Sunday, June 09, 2019 8:10 AM

oldermodelguy

 

 
Don Stauffer

 

 

A lot of us keep a package of plastic spoons on hand to practice/test finishing methods.  They tend to be a little smoother- better finish than kit sprue.

 

 

 

I know Don ( I have a 1 gallon freezer bag full of empty prescription bottles I use myself) .  But my thought was spru would be more shaped like exhaust pipe. Plastic spoons are kind of like "the standard" though !

 

 

All good suggestions. Plastic water and coke bottles are also good test mules.

 

 GIFMaker.org_jy_Ayj_O

 

 

Too many models to build, not enough time in a lifetime!!

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