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Jims RV-8
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Date: 6-6-2014
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Number of Hours: 3.00
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Manual Reference: 8-2, 8-3, 8-5
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Brief Description: clean up parts in prep for etch and primer
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Today I did some recon work on the proper use of the Stewarts EkoEtch and EkoPrime in advance of tomorrows' session. I am planning on getting the parts primed, but before the parts can be primed, they must be acid etched to give the aluminum some "tooth" for the primer to adhere to.
So, walking the process backwards - Before we can etch, we make sure there are no oils or residues on the parts - so the parts get a good scrubbing in dawn/water and then get air dried. I thought about going ahead and etching some parts today but the instructions say that you need to prime within 12 hours of etching - so as to achieve maximum adhesion of the primer to the metal. ..and because the acid etch removes some of the protective layer of the metal and you don't want to leave the metal in that state too long or the corrosive effects begin again. Another "rule" for the primer is it must be spreayed in a temperature between 70-85 degrees. And since it is already 92, I would have to wait until morning. So, tomorrow morning the plan is to start etching and then prime!
The picture below is all of the fuselage parts that have been worked so far (except for the firewall itself, which is stainless steel, and the floor skin - which hasn't been cleaned yet). It includes the firewall parts (picture - lower right), landing gear box assemblies (Left side of pic), air ramp and stiffeners (the "square" in the middle right) and the forward fuse floor skeleton (upper right)
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on a ladder...looking down at all the parts
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