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Best wood putty to cover scratchs for MDF

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The Lumberjackass:
bondo / isopon p38 is a great filler . it sets rock hard in under 10mins if mixed correctly and can be worked on in just over 15mins.
any other filler used for wood , including the plastic based types ( rawlplug plastic wood filler for example ) take ages to set and
sometimes in the sanding stage , chunks can come away leaving the user to re-apply more to cover the flaw.

the only downside to using bondo / p38 on bare mdf , is that the filler is harder than the wood ( its polyester )
and the mdf sands easier than the filler . this can be a problem when trying to get a proper smooth finish as
the area around the hole can be sanded away more than the filler itself . bondo is designed for wetsanding and you
need to be used to handling it / sanding it / working with it to get the best from it , especially if you are not using water.

and lastly , while i do reccomend the use of bondo / p38 as the best filler out there , dont use a water based
filler on mdf , for obvious reasons . but any filler out there should work okay for you . just watch out for the slow curing type
as you cant fill a hole in 1 go with them. you have to apply it bit by bit and then sand it back.

mgb:

--- Quote from: javeryh on August 11, 2010, 08:03:30 pm ---Everyone should really be using bondo for this type of stuff.  It sands easy but is rock hard.  There's really no reason to use anything else, IMO.

 :dunno

--- End quote ---

I agree. the single part nail fill putties dont really fully cure.
There are also different levels of body filler such as bondo, for fine scratches, there are smoother top coat fillers.

Minwax 2 part wood filler is also great.

For fine sanding scratches, you should be using lighter grits of sandpaper to work out, not just filling.

atomikbohm:
I didn't realize that there we so many options when it came to repair materials.  So seeing that there are way more choices than I knew ... What would you guys recommend to smooth out the particle board on my NFL Blitz cab.  I already pealed the vinyl off, it was in bad shape.

Little history - Last summer I pealed sanded and had my father in law help me "skim coat" one side with a premixed wood filler I picked up at home depot.  That's when I learned that my father in-law will not be helping me with any other projects, arcade or other wise.  :banghead: I'll be getting a belt sander soon and taking it down to the wood again.  My plan was to thin the wood filler down so that it spread easier and not so thick as before.  As I'm covering a large area is wood filler the best choice?

Sorry for the thread hijack. :-[

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