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Forum topic by Edwin posted 1468 days ago 1325 views 0 times favorited 10 replies Add to Favorites Watch
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Edwin

97 posts in 1624 days


1468 days ago

Ive been making some oval picture frames from wood magazine. I glued up five piece of wood 1 1/4” wide the center piece is pine than the next two pieces on each of the pine are black walnut, than I glued two pieces of oak to the outside. I than proceeded to cut an oval 6 5/8” tall by 5 1/8” wide. The center also has an oval cut out which is 4” tall by 2 1/2” wide than on the inside oval you rout a 1/4” cove. My problemis is this I got burn marks on the pine and oak. How do I remove the burn marks without taking away the sharp lines that the router created.
Thanks for any info. Ed

-- Ed Port Republic


10 replies so far

View richgreer's profile

richgreer

4522 posts in 1700 days


#1 posted 1468 days ago

The best idea is to not get burn marks in the first place. Often, burn marks are due to a less than perfectly sharp bit. Make certain your bit is sharp.

Also – Make sure you keep the router moving and don’t take off too much in any one pass.

-- Rich, Cedar Rapids, IA - I'm a woodworker. I don't create beauty, I reveal it.

View Edwin's profile

Edwin

97 posts in 1624 days


#2 posted 1468 days ago

Hi Rich, I was going very slow and had such a shallow cut and the bit was brand new. I had to take the parafin wax off before i used it. Now i’m really scratching my head ?? Thanks Ed

-- Ed Port Republic

View ajosephg's profile

ajosephg

1850 posts in 2187 days


#3 posted 1468 days ago

You may have been going too slow. There’s a happy balance betwee too slow and too fast. Too slow causes burning, too fast bogs the router or causes you to lose control of the cut.

-- Joe

View richgreer's profile

richgreer

4522 posts in 1700 days


#4 posted 1468 days ago

Let me also comment that a new bit is not necessarily a sharp bit. I’ve often had to sharpen a new bit before using it.

-- Rich, Cedar Rapids, IA - I'm a woodworker. I don't create beauty, I reveal it.

View TopamaxSurvivor's profile

TopamaxSurvivor

14721 posts in 2302 days


#5 posted 1468 days ago

I had that problem going too slow when I first started routing. Took a long time to figure it out. No internet in the 70s :-))

-- "some old things are lovely, warm still with life ... of the forgotten men who made them." - D.H. Lawrence

View Lee A. Jesberger's profile

Lee A. Jesberger

6646 posts in 2605 days


#6 posted 1468 days ago

Hi Ed;

To remove burn marks, spray the burn marks with mineral spirits, then sand them carefully.

The mineral spirits makes burns much easier to remove.

Lee

-- by Lee A. Jesberger http://www.prowoodworkingtips.com http://www.ezee-feed.com

View Gene Howe's profile

Gene Howe

5508 posts in 2054 days


#7 posted 1468 days ago

Lee has the idea. I’ve also used lacquer thinner with quicker results. i.e less sanding. A lot will come away with a rag. Wet sand the rest.

-- Gene 'The true soldier fights not because he hates what is in front of him, but because he loves what is behind him.' G. K. Chesterton

View AaronK's profile

AaronK

1396 posts in 2090 days


#8 posted 1468 days ago

not sure exactly of the overall design/profiles you’re describing, but a curved card scraper sharpened up nice might help as well.

View Sawdust4Blood's profile

Sawdust4Blood

346 posts in 1647 days


#9 posted 1468 days ago

Like Aaron, my first choice for burn marks is a scraper when possible. If you have a very fine adjustment on your router depth, you can also expose just a skosh more of the bit and run the router over for another quick pass. As others have suggested, you might be routing too slow or you might try slowing the rotation speed. As Rich suggested all but the best quality bits can usually stand a little honing even when they are brand new. Pitchy woods (like pine) will always burn more/faster than others and will require cleaning the bits more frequently.

-- Greg, Severn MD

View jusfine's profile

jusfine

2280 posts in 1552 days


#10 posted 1468 days ago

Greg, you beat me to the solution I thought of.

I would also try taking just a hair (or a skosh) more and that should clean it up.

-- Randy "You are judged as much by the questions you ask as the answers you give..."

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