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How to repair gouged MDF?

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Forum topic by JohnEinNJ posted 06-18-2012 11:17 PM 3967 views 0 times favorited 17 replies Add to Favorites Watch
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JohnEinNJ

88 posts in 1034 days


06-18-2012 11:17 PM

So I just finished building Wood Magazine’s tilt-top workbench (like this: http://lumberjocks.com/projects/57008), and was trimming up the maple band around the edge with a router. The router grabbed onto the edge, and did a little dance on the MDF top, making about a 1/2 inch deep by 3 inch long gouge :(. What’s the best way to fill & repair MDF?


17 replies so far

View tyskkvinna's profile

tyskkvinna

1308 posts in 1673 days


#1 posted 06-18-2012 11:20 PM

I have had decent luck with MDF sawdust and glue (since, yknow, that’s basically what it is right now!)

-- Lis - Michigan - http://www.missmooseart.com - https://www.etsy.com/people/lisbokt

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Tyrone D

314 posts in 1020 days


#2 posted 06-18-2012 11:20 PM

When filling holes in MDF drywall compound works very good but I doubt it’d work in your situation.

-- --Tyrone - BC, Canada "Nothing is ever perfect, we just run out of time."

View Alexandre's profile

Alexandre

1417 posts in 878 days


#3 posted 06-18-2012 11:22 PM

I think some sanding dust mixed with glue to make a nice thick mixture and pour it in, then when dry, sand it (Gosh, Wear a dust mask while doing this) and there you go! Hope this helps

-- My terrible signature...

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mark4345

55 posts in 1110 days


#4 posted 06-18-2012 11:26 PM

bondo

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Wdwerker

333 posts in 920 days


#5 posted 06-18-2012 11:28 PM

Bondo rules! Drywall compound would only be for vertical surfaces.

-- Fine Custom Woodwork since 1978

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canadianchips

1831 posts in 1684 days


#6 posted 06-18-2012 11:37 PM

Liz said it best. Sawdust and glue.

-- "My mission in life - make everyone smile !"

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doughan

96 posts in 1278 days


#7 posted 06-18-2012 11:44 PM

saw dust and glue or bondo….bondo if you are in a hurry…..mix it hot and fast then use a putty knife to get it close before it gets to hard.

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AandCstyle

1381 posts in 944 days


#8 posted 06-19-2012 12:20 AM

+1 Bondo

-- Art

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waho6o9

5078 posts in 1264 days


#9 posted 06-19-2012 12:31 AM

bondo, yeah buddy

View mtenterprises's profile

mtenterprises

830 posts in 1380 days


#10 posted 06-19-2012 01:10 AM

Router out the damaged area and insert a new MDF patch, glue as needed.
MIKE

-- See pictures on Flickr - http://www.flickr.com/photos/44216106@N07/ And visit my Facebook page - facebook.com/MTEnterprises

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JohnEinNJ

88 posts in 1034 days


#11 posted 06-26-2012 02:30 PM

Thanks to everyone for your responses. Just to wrap this up, I believe mtenterprises’ response (rout out damaged area & patch) is the “right” way to do it. But since a router mishap – due to my inexperience – is what caused the problem in the first place, I decided to do it one of the “less right” ways: glue mixed with sawdust. It took two days to dry enough to be sandable. Not pretty, but it worked.

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mtenterprises

830 posts in 1380 days


#12 posted 06-26-2012 08:57 PM

The only way you are going to learn is try and do. Now you will continue to look at your repair and say to yourself “I should have done it right” and one of these days you will make that repair correct.
MIKE

-- See pictures on Flickr - http://www.flickr.com/photos/44216106@N07/ And visit my Facebook page - facebook.com/MTEnterprises

View DS's profile

DS

2131 posts in 1107 days


#13 posted 06-26-2012 09:06 PM

MDF + Bondo = MFEO

-- "Hard work is not defined by the difficulty of the task as much as a person's desire to perform it.", DS251

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DaddyZ

2414 posts in 1727 days


#14 posted 06-26-2012 09:26 PM

I would have filled with epoxy

-- Pat - Worker of Wood, Collector of Tools, Father of one

View madts's profile

madts

1280 posts in 1026 days


#15 posted 06-26-2012 09:29 PM

Durham’s rock hard water putty. This stuff is awesome.

-- Thor and Odin are still the greatest of Gods.

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