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Sanding MDF doors

1/17/23       
Matt Member

This is for the MDF door manufacturers out there or those with knowledge. How do you sand 1pc and 2pc MDF doors in a production environment? Thanks for any insights!

1/18/23       #3: Sanding MDF doors ...
Redfish_Matt Member

There are about as many methods as there are cabinet shops and it entirely depends on what your clients are paying for. Currently, the level of finish our clients requires basically means that MDF doors are more expensive than maple because of the amount of labor and reworks you end up with, in an effort to get something that has the sleek look of maple that's been passed through a fresh shaper blade.

Back when we did MDF routed doors, we'd dynabrade the face and back with 180 just to quick scuff it, and then would hand-sand all the routed profiles with 320 then 400 and sometimes we had to even go to 600.

We'd use a high quality post-cat primer and let it cure overnight before scuffing for topcoat. Usually I had to do one coat primer and two coats topcoat to get it looking right.

1/21/23       #4: Sanding MDF doors ...
Roy Cameron

I start with the Festool rts400 sander and then a Surfprep sander. I feel a Surfprep sander is a must if your doing mdf doors. The Surfprep sander gets nice and tight into the corners.

1/30/23       #5: Sanding MDF doors ...
Kelly

Website: https://www.molepatrolkc.com/

MDF is easily damaged. You only want to remove the surface sheen of the door. When all doors are sanded, use fine-grit sandpaper to smooth away any scratches or uneven spots in the finish. Wipe away the dust with a dry cloth before you prime the door.

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