Refinishing MDF..advice?

tech9_79 · 31st July 2009, 01:21 AM

So I have a set of speakers/stands that i want to strip and refinish using MJL21193's method, SB urethane primer, rustoleum black then most likely varathane diamond WB poly.

The paint job on them now is SW oil based primer/color and a very unsuccessful brushed on lacquer top coat.. oh and the raw mdf was sealed with shellac.

Any helpful hints on removing the current finish? besides lots of heavy sanding...

infinia · 31st July 2009, 02:36 AM

I wouldnt sand to remove the last paint job... just to make thing smooth and ready adhere the next primer.
sanding > SW oil primer> sanding

Stuey · 2nd August 2009, 06:48 AM

Or you could use one of the many paint strippers available, and a scraper, being careful not to mar the surface.

tech9_79 · 3rd August 2009, 01:49 AM

About the paint strippers, thats kind of why i was asking. Is methylene chloride safe to use on mdf? Mdf is not the usual suspect so to speak. just dont go overboard i guess.

infinia · 3rd August 2009, 02:12 AM

Why must the old paint be removed? It just adds more work and toxic stuff. FYI modern paint strippers use WATER as part of the removing/clean up process.

tech9_79 · 3rd August 2009, 02:19 AM

no real reason just me being neurotic.. I will check it out and if its too much work I will just flat sand it.

Just say no to water, thanks for the heads up.

Stuey · 3rd August 2009, 10:06 AM

I agree about not removing the old, but Tech asked about stripping. The paint, that is.

31st July 2009, 01:21 AM	#1
tech9_79 diyAudio Member Join Date: Mar 2008	Refinishing MDF..advice? So I have a set of speakers/stands that i want to strip and refinish using MJL21193's method, SB urethane primer, rustoleum black then most likely varathane diamond WB poly. The paint job on them now is SW oil based primer/color and a very unsuccessful brushed on lacquer top coat.. oh and the raw mdf was sealed with shellac. Any helpful hints on removing the current finish? besides lots of heavy sanding...

31st July 2009, 02:36 AM	#2
infinia diyAudio Member Join Date: May 2005 Location: Californication	I wouldnt sand to remove the last paint job... just to make thing smooth and ready adhere the next primer. sanding > SW oil primer> sanding __________________ like four million tons of hydrogen exploding on the sun like the whisper of the termites building castles in the dust

3rd August 2009, 02:12 AM	#5
infinia diyAudio Member Join Date: May 2005 Location: Californication	Why must the old paint be removed? It just adds more work and toxic stuff. FYI modern paint strippers use WATER as part of the removing/clean up process. __________________ like four million tons of hydrogen exploding on the sun like the whisper of the termites building castles in the dust

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2nd August 2009, 06:48 AM	#3
Stuey diyAudio Member Join Date: Mar 2006 Location: Perth, Western Australia	Or you could use one of the many paint strippers available, and a scraper, being careful not to mar the surface.

3rd August 2009, 01:49 AM	#4
tech9_79 diyAudio Member Join Date: Mar 2008	About the paint strippers, thats kind of why i was asking. Is methylene chloride safe to use on mdf? Mdf is not the usual suspect so to speak. just dont go overboard i guess.

3rd August 2009, 02:19 AM	#6
tech9_79 diyAudio Member Join Date: Mar 2008	no real reason just me being neurotic.. I will check it out and if its too much work I will just flat sand it. Just say no to water, thanks for the heads up.

3rd August 2009, 10:06 AM	#7
Stuey diyAudio Member Join Date: Mar 2006 Location: Perth, Western Australia	I agree about not removing the old, but Tech asked about stripping. The paint, that is.

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