Slightly OT: Finishing MDF - options?

[rinx]

I suggest epoxy.
I have tryed regular wood-spackle based on water. But what will happen in MDF after painting(based on water)-it constringe, so teher will be still socket on the surface.

Make sense?!

 

[lousymusician]

What type of spackle/putty do you guys like the best? I want to make sure I get the right stuff and it won't crack over time. Thanks.

Matt

I've not tried painting MDF myself, but I've seen several threads that recommend Bondo (auto body filler) rather than spackle. Bondo's not water based, so it won't cause the MDF to swell, and it sands very smooth.

 

[dangus]

I've used 1/4" dowel plugs to fill countersunk screw holes, then trimmed them flush with the router. It looks good on varnished plywood cabinets. Over time, though, they don't stay perfectly flush. I guess the different woods are affected by moisture differently.