Sanding marks or defect in wood?

[adamf2]

I have just sanded this worktop in prep for oiling and as I sanded vertical lines show up. The kitchen island I have sanded in the same way had no lines on it. Could there be an problem with the manufacturing from Wren Kitchens?

Please help!

Thanks Adam

 

[sunnybob]

looks to me as though it skipped its way through the thicknesser.

 

[adamf2]

Do you think we should be asking for a replacement?

 

[Random Orbital Bob]

Use a random orbital sander starting with 120 grit and move up through to at least 240 maybe even 320, each grit removing the scratches from the last. No point in sending it back, too much hassle, just sand the problem away using the appropriate tool and grit choice.

If 120 doesn't remove the ridges, go coarser by one grade (100 or 80)

One caveat, I'm assuming the worktop is unfinished? If it's pre-finished, you should change it unless you're also prepared to go to the trouble of refinishing it.

 

[thetyreman]

I would buy or make a sanding block, then get 80, 120, 180, 240 grits, go through each grit one by one, or you could use a powersander, I like my black and decker mouse a lot for this.

 

[RobinBHM]

It is caused by a machining fault. I would guess worktops are put through a wide belt sander and this piece of worktop shows chatter marks as a result of a fsult in machine setup

As others have said, the answer is to work through the grits to eliminate the marks. If doing by hand you will need a firm sanding block and some elbow grease to cut through the chatter marks

 

[Chrispy]

Is it the right way up? Usually there's a good side and the bad which do not get the full treatment during manufacture.