Recently, I built a router table extension to my hybrid table saw from 3/4 inch MDF. I installed a removable router fence and mounted a router underneath.
I would like to surface coat the MDF to prevent it from wearing down and to make it slick. Also, I want to protect it from moisture and from the occasional soda can ring impression.
What is a good option for a coating other than paint for MDF?
Thanks, ATOMA
Replies
Shellac makes a good workshop finish for MDF. Assuming you're not too concerned about looks, I'd just brush on a coat of Zinsser amber shellac, straight from the can, let it dry for two hours, sand lightly with 220 grit, then apply a second coat.
-Steve
I did MDF a with shellac finish. Sanded smooth. Then applied a wax with 0000 steel wool. Slick as an icerink and seems fairly well protected.
I agree.. I have several router tables.. One Cast Iron and all the others are self made with 3/4 inch MDF (I look for the cheep stuff) except for a old a Rockler table with some plastic on the surfaces.. All are still true and flat! AND! I have had them ALONG time! AND... they remain in a unheated/UN-airconditioned shop year around. I have NEVER had one warp or otherwise any other 'bad' thing happen to them..
OK, except for when I put a wet bottom coffee or wine glass on one.. And then I can just sand it down the ridges left behind.
I wonder why some folks get so upset with us folks that use MDF. It remains very stable unless you get it VERY wet!
I'd say, seal the edges! Shellac or even latex paint. Top and bottom with Shellac and keep it waxed! As in the TV adds.. Your results may vary!
Edited 5/6/2008 5:08 pm by WillGeorge
Formica. It is actually pretty easy to put on, and wears better than anything else I can think of.
Check with the local shops, that do counter tops, and cabinets. They frequently have "small" pieces left over from the jobs, and will let you have them cheap or for free, if they are running out of storage space.
When I first decided to try using formica, a guy I know let me have several hundred pounds of it that he was going to throw away.
Even if you had to buy a 4X8 sheet, you could use the rest for the top on a glue up or outfeed table.
In addition to the other info. Be sure to seal both surfaces and all edges.
Work Safe, Count to 10 when your done for the day !!
Bruce S.
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