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Forum topic by Karda posted 10-23-2018 12:24 AM 497 views 0 times favorited 13 replies Add to Favorites Watch
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Karda

1303 posts in 730 days


10-23-2018 12:24 AM

when using CA to fill cracks on bowl blanks some gets on the wood surrounding the crack especially if the are small and sometimes it don’t sand out. can anything be done with it


13 replies so far

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LeeMills

610 posts in 1477 days


#1 posted 10-23-2018 12:46 AM

I dip a finger tip in shellac and give it a light coat. It seals the wood from the CA. May take a minute or two for the shellac to dry.

-- We cannot solve our problems with the same thinking we used when we created them. Albert Einstein

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Karda

1303 posts in 730 days


#2 posted 10-23-2018 03:53 AM

ok but won’t that keep the CA out of the crack as well

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TheDane

5534 posts in 3839 days


#3 posted 10-23-2018 01:14 PM

Not necessarily … note his emphasis on light coat.

-- Gerry -- "I don't plan to ever really grow up ... I'm just going to learn how to act in public!"

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Rich

3759 posts in 765 days


#4 posted 10-23-2018 03:14 PM

You can try a more viscous glue. A medium thickness will help reduce the spread and penetration into the grain. If that’s too thick, Starbond makes one they refer to as heavy thin, which is kind of in between medium and thin.

I tried all sorts of sealers and found that they were as much of a problem to remove as the glue itself. Going a bit thicker helped.

-- Half of what we read or hear about finishing is right. We just don’t know which half! — Bob Flexner

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Karda

1303 posts in 730 days


#5 posted 10-23-2018 03:43 PM

ok thanks i’ll try that

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Woodknack

12401 posts in 2556 days


#6 posted 10-23-2018 04:17 PM

Don’t wait so long to fill the defect. Fill it when still in the tool phase, before you start sanding.

-- Rick M, http://thewoodknack.blogspot.com/

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Karda

1303 posts in 730 days


#7 posted 10-23-2018 05:45 PM

when do that I just open the crack back up, I have even sanded some smaller crack open that had to be re glued

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Woodknack

12401 posts in 2556 days


#8 posted 10-23-2018 06:01 PM

I suspect you are only getting the filler on the surface and then cutting it away. I add filler, ca, more filler, ca, filler, ca; until the defect is full. Then take my final light cuts.

-- Rick M, http://thewoodknack.blogspot.com/

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Karda

1303 posts in 730 days


#9 posted 10-23-2018 08:45 PM

these are small cracks to small to use a filler of any kind

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LeeMills

610 posts in 1477 days


#10 posted 10-23-2018 09:35 PM

Applying by fingertip I can tell how much is applied better than by a small brush. It could fill a small (sheet of paper thickness) crack I guess but not nearly enough to fill a crack the thickness of a credit card. I do use my shellac wash coat so it has been thinned with 2 parts DNA. Just enough to seal the surface to keep the CA from staining the wood. You can probably use any sanding sealer.

Sorry about my delay in posting.

To add, if you are having the cracks re-appear you may need to go to a thin CA. It may takes several application to fill the crack but the thin CA should penetrate even the smallest crevice.

-- We cannot solve our problems with the same thinking we used when we created them. Albert Einstein

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Karda

1303 posts in 730 days


#11 posted 10-24-2018 04:02 AM

ok thank

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Wildwood

2450 posts in 2311 days


#12 posted 10-24-2018 03:39 PM

Lot of ways a woodturner can deal with shallow or deep cracks in surface of the turning. While CA glue is great for sealing cracks you have to turn or sand away any excess while still on the lathe.

Filling cracks made a lot easier if use combination of fill & CA glue. Choice all about matching wood color or using contrasting colors. Fill can be anything from saw dust, new or used goffee grounds, green or herbal teas.
Old metal shavings, minerals or stone often used for contrasting colors.

I use an electric coffee grinder to grind further any fill will use. In-expensive under $20 or used grinder will work well whether electric or hand crank models. Have never used metal, mineral, or stone for fill.

Fill the crack flush before applying CA for shallow cracks. May take couple applications of fill & CA glue for deep cracks.

Only real secret is take your time!

-- Bill

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Woodknack

12401 posts in 2556 days


#13 posted 10-24-2018 04:10 PM



these are small cracks to small to use a filler of any kind

- Karda


If they are that small, which would be pretty small, I wouldn’t worry about them.

-- Rick M, http://thewoodknack.blogspot.com/

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