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Old 08-01-2006, 09:42 AM
Wayne Hicks Wayne Hicks is offline
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Join Date: May 2004
Location: Carrollton, VA
Posts: 1,376
Default Are you a good "Tipper?"

I absolutely love the raw epoxy finishing technique, but I don’t like the ridges that form when squeegeeing off the skim coats. You do extra work sanding them down after cure.

While reading the WEST System User Manual, I rediscovered "tipping". In the boat building business, you apply several coats of raw epoxy over the laminates to form the barrier coating against moisture intrusion. (Sounds a lot like skim coating, hint, hint?) You “tip off” each coat by dragging a foam brush lightly over the fresh epoxy in long, even, overlapping strokes. Tipping smoothes out stipples and ridges. The manual goes on to describe how to make a tipping brush from a segment of WEST 800 Roller Cover. But I said to myself, “Self, why not use a foam brush?”

So when I did the skim coating on the fuselage, I bought a few disposable foam brushes and tried tipping the skim coats. It worked! It knocked down all the ridges left by the squeegee, and the sanding wasn’t as difficult. I even went so far as to apply the skim coats with the foam brush instead of the roller. The brush acts as its own squeegee, and I found in some areas the epoxy was more easily applied with a brush than a roller.

I still prefer the roller and I still prefer the squeegee, especially on larger surface areas. You’d be there all day with the brush alone.
But tipping does work and I’ve added it to my finishing repertoire!
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http://www.maddyhome.com/canardpages...cks/index.html
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