#1
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Filling tube spirals
What is the best way to fill the tube spirals without adding too much weight?
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#2
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I use one of two(sometimes both) Elmers Fill 'n' Finish and Micro Fil...Scoop some out of the container, add just a tiny bit of water to make it into a pancake batter consistency, and the using a paint brush paint it in the spirals..When dry sand smooth..Or the old standby, a couple coats of primer with sanding in between coats will fill almost all but the biggest tube spirals..
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Jon SAM #0396 BAR 02/07 NAR 86940 KF4GUL Aim high, fly straight! |
#3
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I usually don't worry about it too much but I'm sure most folks here would recommend thinned Elmer's Fil-n-Finish. I've never been able to find it myself, but I've had good results with a similar Minwax product with micro-balloons.
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#4
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There's a bunch of ways, but they all require considerable sanding.
Fill-n-finish, spackle, spot putty, can all be put on and sanded down. You can also fill it by priming it two, three, or four times and sanding down between coats. The primer method slicks up the rest of the tube real good while you're at it. |
#5
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Actually I use Elmers 'Carpenters Wood Filler'..Same thing I have been told as Fill-n-Finish, and I use the same technique...
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Jon SAM #0396 BAR 02/07 NAR 86940 KF4GUL Aim high, fly straight! |
#6
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I use the thinned Fill N Finish method - even though it requires more sanding
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Up next: Under construction: Under repair: In finishing: Centuri Sabre clone In primer: In paint: Ready for decals: Bill Cooke NAR #31312 TRA #19705 SAM #0001 Huntsville, AL My rocket blog My rocket fleet |
#7
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I've recently been using Elmer's Carpenters Wood Filler in a tube. You can snip off a small piece of the tip, and it makes it easy to dispense along the spiral seams in a tube. I smooth with finger, and to press it down into the seams. Sands very easily.
I also just bought Duplicolor Filler Primer, with "high solids". I've not tried yet, but I like regular Duplicolor primer, and if this has more fillers, and behaves like the regular, this could become a favorite of mine. I found both at Walmart, but the Duplicolor was in Automotive, not in the Paint Dept.
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Lee Reep NAR 55948 Projects: Semroc Saturn 1B, Ken Foss Designs Mini Satellite Interceptor In the Paint Shop: Nothing! Too cold! Launch-Ready: Farside-X, Maxi Honest John, Super Scamp |
#8
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I'm trying out that Elmer's Carpenter's Filler on a few of my rockets built over the winter, but I can't yet comment on how it works because I haven't had a decent painting day yet...
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NAR # 115523 Once upon a better day... SAM #0076 My site: http://rocketry.gonnerman.org |
#9
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Re: Carpenter's Wood Filler (and Other Products as well!)
I found with the CWF, that in the past, there have been both Exterior use and Interior.
The Exterior is better for our uses as it tends to be flexible enough when dry to be able to Flex with the body tube and not 'peel off'. All putties usually are marked when for exterior use. Be Sure to lOOk for and select the exterior use type whenever possible. Just a thought from many years of use. Thanks to CMASS and Nemroc '91 for that!
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Glen A. N.A.R. #26298 L1 |
#10
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I just used some Hobbico Hobbylite filler to smooth out the spirals in the tubes of three rockets I've recently built, and it worked great. It was $6.99 for an 8 oz. plastic jar, which should be enough to last for a few thousand rockets at my best estimate.
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