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Baking Soda: God's gift to CA

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  • Member since
    January 2006
  • From: NW Washington
Baking Soda: God's gift to CA
Posted by dirkpitt77 on Saturday, February 28, 2015 9:36 AM

   I had to post up about this because this trick is one of the most remarkable I've learned in the last few years.

I'm working on Italeri's WC-56 Dodge Staff Car. Unfotunately, the driveshafts that connect the axles to the transfer case did not quite fit--they were too short. In debating a fix for this, I began to wonder if the tendency of CA to 'wick', or use its capillary action and surface tension, would work to my advantage.

I held the driveshaft in place with tweezers, and applied a large drop of CA to the place where each end hovered near its connecting point. Sure enough, capillary action drew the CA into a sort of 'weld' in the space between the parts.

Here's where the magic happens. With my free hand, I took a pinch of baking soda from a cup I keep it stored in and I dribbled it over each of the CA drops. BAM! Instant hardened joint. The driveshaft froze in perfect position where it needed to be.

Since I will be placing the truck on a small diorama with a lot of mud, when I weather the chassis the joints will be covered in mud. This makes up for the loss of detail when it's covered by the CA/Baking soda joint. I ended up using this same trick to reinforce the locations where the leaf springs and the axles attached as well. I also will do this on aircraft undercarriage if I can get away with it without making it look ugly. Can't hide it with mud like you can on ground vehicles. But it makes for a very stout connection.

A lot of people know about the CA/ Baking soda thing, but I'm just amazed at how many ways it can be used to strengthen weak joints, fill seams, and improve construction. In my book it's as pivotal to construction as Future is to finishing.  I was just excited about it this morning so I thought I'd post up.

Have a great day guys. Model on!

Chris

    "Some say the alien didn't die in the crash.  It survived and drank whiskey and played poker with the locals 'til the Texas Rangers caught wind of it and shot it dead."

  • Member since
    January 2013
Posted by BlackSheepTwoOneFour on Saturday, February 28, 2015 10:44 AM

Can you post a few pics or a video? I'm curious and intrigued.

  • Member since
    January 2014
  • From: Nampa, Idaho
Posted by jelliott523 on Sunday, March 1, 2015 4:33 PM

Dirk, I've never used this technique for modeling; however, I did use this on an interesting shoe repair recently.  My wife had brought me a pair of boots that the sole had started to separate from the body of the boot.  She asked me if I could fix it temporarily so she could wear them that night.  I had heard about baking soda instantly curing CA so I thought I'd give it a shot.  I took some of my medium viscosity CA and applied it to the boot and then sprinkled a very small amount of soda on the area.  It instantly set the CA and was able to apply shoe polish over the spot to cover up the fine white line left from the baking soda.  The fix held all night and is still holding to this day.

On the Bench:  Lots of unfinished projects!  Smile

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