Bronze Sealing Problems

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Becka W
Posts: 5
Joined: Wed Apr 10, 2013 10:27 pm

Bronze Sealing Problems

Unread post by Becka W » Sat Nov 23, 2013 6:21 pm

Hi, I heat treated a bronze sculpture that I made at college (poured into a scratch block) and am trying to seal it while maintaining the purples and blues from the heat-treating. I have tried two different waxes from school and one matte protectant spray from JoAnn’s fabric store. When covered, the color changes to an olive green. I’m hoping you have suggestions on how to protect those colors please. I’m going to try and included three pictures to show the difference in color between places I’ve placed the sealant and places that don’t have it on. One is the top view with just a portion sealed and one is the bottom view with only a portion sealed. The third picture shows the best wax I’ve tried so far.

Thanks, Becka W.

http://www.metalsmith.org/phpbb/gallery ... age_id=161

http://www.metalsmith.org/phpbb/gallery ... age_id=160

http://www.metalsmith.org/phpbb/gallery ... age_id=159

I can't seem to get the links for the pictures to work. I did make an album where the pictures are; though the close up shots of the bronze are across 2 pages. Maybe this link to the album will work instead

http://www.metalsmith.org/phpbb/gallery ... lbum_id=22
Becka W.

Marty.Hicks
Posts: 71
Joined: Sat Mar 09, 2013 8:27 am

Re: Bronze Sealing Problems

Unread post by Marty.Hicks » Sun Nov 24, 2013 9:36 am

Hi Becka,

My recommendation would be to first remove any wax, oil, and dirt with mineral spirits, then use a clear spray lacquer. If you'd like, you could protect it further with a neutral wax like Butchers Bowling Alley Wax from the BWC Company.

Marty

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Becka W
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Joined: Wed Apr 10, 2013 10:27 pm

Re: Bronze Sealing Problems

Unread post by Becka W » Sun Nov 24, 2013 11:35 am

Thanks bunches Marty,

Here is one thing I tried to use after sandblasting then heat treating in the toaster oven until purple & blue:

http://www.krylon.com/products/matte-finish/

Do you have a brand of clear spray lacquer that you recommend? Is it something sold at Menard's? I'll sandblast it again to remove everything before I heat treat it purple-blue again.

~ Thanks again, Becka
Becka W.

Marty.Hicks
Posts: 71
Joined: Sat Mar 09, 2013 8:27 am

Re: Bronze Sealing Problems

Unread post by Marty.Hicks » Sun Nov 24, 2013 9:11 pm

I think the best product is "Permalac" in a satin finish. It's pricey though. You'd probably be fine going to Hirshfield's or Sherwin Williams and asking for a spray lacquer. One thing -- if you do apply wax on top of the lacquer, it's best to warm the metal first (not hot).

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Becka W
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Joined: Wed Apr 10, 2013 10:27 pm

Re: Bronze Sealing Problems

Unread post by Becka W » Sun Nov 24, 2013 9:38 pm

Thanks, Once metal is heated to colors of blue and purple is it possible for the colors to stay without sealant? Or, over time will it all turn blackish?
Becka W.

Marty.Hicks
Posts: 71
Joined: Sat Mar 09, 2013 8:27 am

Re: Bronze Sealing Problems

Unread post by Marty.Hicks » Mon Nov 25, 2013 7:07 pm

No, over time it will oxidize and change colors. Lacquer is your best bet, then waxing periodically.

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Becka W
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Joined: Wed Apr 10, 2013 10:27 pm

Re: Bronze Sealing Problems

Unread post by Becka W » Mon Nov 25, 2013 8:58 pm

Thanks
Becka W.

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