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Author Topic: cracking up ?  (Read 2177 times)

Offline crazylegs

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cracking up ?
« on: November 03, 2017, 08:19:55 PM »
Just sanded a small bowl. Got a lovely finish but was disappointed to find lots of hairline cracks in the base inside. Were these caused by the friction when sanding? Only on the base not on the sides so I am thinking its heat.
What am I doing wrong?
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Offline GBF

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Re: cracking up ?
« Reply #1 on: November 03, 2017, 08:23:22 PM »
Possably heat checks slow down sanding speed and dont press too hard.

Regards George
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Offline crazylegs

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Re: cracking up ?
« Reply #2 on: November 03, 2017, 08:32:33 PM »
What I need is a big box of patience. Flea bay must sell it !!
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Offline GBF

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Re: cracking up ?
« Reply #3 on: November 03, 2017, 08:48:02 PM »
A lot of woodturning is about patiance taking the time it takes to do it properly.
Speed will come as you get more experiance.

Regards George
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Offline Wood spinner

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Re: cracking up ?
« Reply #4 on: November 04, 2017, 09:37:48 PM »
You could try wet sanding with liquid paraffin slowly
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Offline Lazurus

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Re: cracking up ?
« Reply #5 on: November 06, 2017, 09:21:58 AM »
Fill the cracks with epoxy and metal shavings.... design opportunity!
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Offline hughie

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Re: cracking up ?
« Reply #6 on: November 29, 2017, 10:40:14 AM »
Yup heat-related problems from over zealous sanding ... we have all done it :) is the most common reason. One of the ways to deal with it is to the offending area with CA or super glue, give a few hours to dry/harden up then fine sand back. If the timber if dark most of the hairline cracks etc will disappear.
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