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What are these snail trail marks on my walnut?

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Forum topic by 67Cam posted 01-21-2022 04:20 PM 668 views 0 times favorited 10 replies Add to Favorites Watch
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67Cam

21 posts in 126 days


01-21-2022 04:20 PM

I’m building a small walnut box and have sanded to 220. Everything looked good until I wiped it down with denatured alcohol and noticed these marks. Every sanding level I’ve sanded with the grain. New to woodworking so this may be normal and nothing to worry about, but I’d like to know before I start finishing.


10 replies so far

View OldBull's profile

OldBull

570 posts in 754 days


#1 posted 01-21-2022 04:23 PM

The rubber tip on my air nozzle will leave marks like this, I usually blow them off after sanding. Could be oil from the compressor as well.

It could be oil from the wood, try wiping with naptha.

View splintergroup's profile

splintergroup

6950 posts in 2681 days


#2 posted 01-21-2022 04:41 PM

I’d also lean towards the tool marks explanation.

Walnut is fairly soft and just sliding it over a surface while sanding can leave these marks. I always try to use a pad between my board and table to sand upon, The rubbery open-mesh looking drawer/shelf liner stuff works well and helps to keep smaller boards from spinning in circles while sanding.

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67Cam

21 posts in 126 days


#3 posted 01-21-2022 04:54 PM


The rubber tip on my air nozzle will leave marks like this, I usually blow them off after sanding. Could be oil from the compressor as well.

It could be oil from the wood, try wiping with naptha.

- OldBull

Thanks for the reply. Naphtha isn’t (allowed to be) sold here, so I’ll have to try something else. Maybe lightly go over it with 220 or higher.


I d also lean towards the tool marks explanation.

Walnut is fairly soft and just sliding it over a surface while sanding can leave these marks. I always try to use a pad between my board and table to sand upon, The rubbery open-mesh looking drawer/shelf liner stuff works well and helps to keep smaller boards from spinning in circles while sanding.

- splintergroup

I think you’re right – I haven’t been careful when handling it. First time working with walnut. I used this rube goldberg contraption to hold the top and bottom together when I drilled the holes for the hidden barrel hinges. No doubt it probably happened then.

Edit – not sure why pic is sideways. In my album it’s right side up. Not sure how to correct it…

View Lazyman's profile

Lazyman

9601 posts in 2846 days


#4 posted 01-21-2022 04:58 PM

If it doesn’t come off with a solvent, it is probably burnished marks from rubbing against something. A little hand sanding should remove it but a card scraper is another way to get a nice smooth surface.

-- Nathan, TX -- Hire the lazy man. He may not do as much work but that's because he will find a better way.

View bigblockyeti's profile

bigblockyeti

8527 posts in 3179 days


#5 posted 01-21-2022 05:04 PM


Thanks for the reply. Naphtha isn t (allowed to be) sold here, so I ll have to try something else. Maybe lightly go over it with 220 or higher.

Edit – not sure why pic is sideways. In my album it s right side up. Not sure how to correct it…

- 67Cam


Where are you located that naphtha is allowed to be sold?

I would also say the marks are from handling, not gross mishandling, but from something just pointy enough to make a very slight depression across the wood.

-- “I never in my life thought I would have to say this, but the proper role of government is not to fund the distribution of crack pipes,” Lauren Boebert

View rtbrmb's profile

rtbrmb

909 posts in 3847 days


#6 posted 01-21-2022 10:40 PM

Hopefully you post the project when completed.

I have learned a similar lesson the hard way- vacuumed off a project and didn’t pay attention that when I ran the vacuum nozzle across my project….it left similar marks.

If you go into your pictures & orient it correctly- then crop it slightly- it should come out right way up.

Bill in MI

View 67Cam's profile

67Cam

21 posts in 126 days


#7 posted 01-22-2022 03:51 PM

Thanks for the reply. Naphtha isn t (allowed to be) sold here, so I ll have to try something else. Maybe lightly go over it with 220 or higher.

Edit – not sure why pic is sideways. In my album it s right side up. Not sure how to correct it…

- 67Cam

Where are you located that naphtha is allowed to be sold?

I would also say the marks are from handling, not gross mishandling, but from something just pointy enough to make a very slight depression across the wood.

- bigblockyeti

Thanks for the response. I’m in California.

View 67Cam's profile

67Cam

21 posts in 126 days


#8 posted 01-22-2022 03:52 PM



Hopefully you post the project when completed.

I have learned a similar lesson the hard way- vacuumed off a project and didn t pay attention that when I ran the vacuum nozzle across my project….it left similar marks.

If you go into your pictures & orient it correctly- then crop it slightly- it should come out right way up.

Bill in MI

- rtbrmb

Thanks Bill!

View LittleBlackDuck's profile

LittleBlackDuck

9454 posts in 2279 days


#9 posted 01-22-2022 10:05 PM


Edit – not sure why pic is sideways. In my album it s right side up. Not sure how to correct it…

- 67Cam

Hi 67, can’t help you with your ’nut’s marks, but can help with the picture.

The orientation that the pic is taken in is stored as metadata in the file. Most viewing devices will interpret that data and orient the viewed picture accordingly. When the picture is uploaded to LJ, the metadata (or some of it) is stripped off and the “correct” orientation (as per the picture taker device) is presented.
Basically if you take the picture in portrait orientation, it will be displayed as landscape on the LJ forum.

Usually modifications (eg. resize) on a PC will strip/alter the metadata and the picture should be displayed as it would appear uploaded… that way you can rotate it before uploading…

Alternatively, ”Preview” the picture after uploading,

if sideways, download it to your PC (right click and select “save image as”), rotate it and replace the original uploaded LJ copy.

It may be a pain (once by the poster), but it does make life easier (and personally courteous) for the hundreds of LJ viewers.

-- If your first cut is too short... Take the second cut from the longer end... LBD

View 67Cam's profile

67Cam

21 posts in 126 days


#10 posted 01-23-2022 12:57 AM


Edit – not sure why pic is sideways. In my album it s right side up. Not sure how to correct it…

- 67Cam

Hi 67, can t help you with your nut s marks, but can help with the picture.

The orientation that the pic is taken in is stored as metadata in the file. Most viewing devices will interpret that data and orient the viewed picture accordingly. When the picture is uploaded to LJ, the metadata (or some of it) is stripped off and the “correct” orientation (as per the picture taker device) is presented.
Basically if you take the picture in portrait orientation, it will be displayed as landscape on the LJ forum.

Usually modifications (eg. resize) on a PC will strip/alter the metadata and the picture should be displayed as it would appear uploaded… that way you can rotate it before uploading…

Alternatively, ”Preview” the picture after uploading,

if sideways, download it to your PC (right click and select “save image as”), rotate it and replace the original uploaded LJ copy.

It may be a pain (once by the poster), but it does make life easier (and personally courteous) for the hundreds of LJ viewers.

- LittleBlackDuck

Thanks LBD!

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