mdf paint - diyAudio
Go Back   Home > Forums > Loudspeakers > Multi-Way

Multi-Way Conventional loudspeakers with crossovers

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 9th December 2007, 02:49 AM   #1
diyAudio Member
 
Join Date: Nov 2007
Default mdf paint

Hi!

I plan to give a layer of paint in the MDF material (for open baffle system).

Can anyone give me a suggestion, what kind of paint should I use? any wood paint?or....?

I don't have any experience building a speaker..

Thanks,

Joshua
  Reply With Quote
Old 9th December 2007, 06:13 AM   #2
idaho is offline idaho  United States
diyAudio Member
 
Join Date: Dec 2006
automotive primer-theres some cheap spray cans at walmart

apply,
apply again
and then sand a little bit just to make it smooth but not too much as not to remove the primer.
MDF soaks paint like crazy if you dont prime it.

then pick a spray can color you want and then spray as many coats as desired/needed, wet sand as desired to obtain the smoothness you want starting with 400 grit then progress up to 800-2000 grit if you desire the smoothness. Be carefull not to over do it that you get into the primer or wood itself. Buff with a automotive buffer compound. That is the GENERAL way I do it.

Research, experiment, learn, it DIY.
  Reply With Quote
Old 9th December 2007, 09:36 AM   #3
John L is offline John L  United States
diyAudio Member
 
John L's Avatar
 
Join Date: Oct 2001
Location: Cary NC
Shouldn't you use a sealer first?
  Reply With Quote
Old 9th December 2007, 09:45 AM   #4
Did it Himself
diyAudio Member
 
richie00boy's Avatar
 
Join Date: Nov 2003
Location: Gloucestershire, England, UK
Don't use automotive primer first as you will use gallons of it, MDF is like a sponge. Use a proper MDF sealer. Then you can use automotive primer and topcoat as normal. In the UK I use Rustins or Blackfriar. Bonda over your way do something suitable.
__________________
www.readresearch.co.uk my website for UK diy audio people - designs, PCBs, kits and more.
  Reply With Quote
Old 9th December 2007, 10:41 AM   #5
AndrewT is offline AndrewT  Scotland
diyAudio Member
 
Join Date: Jul 2004
Location: Scottish Borders
Hi,
I have found the flat (pressed) surface of the MDF board to be quite resistant to taking a paint coat. This seems to be much worse when using water based paints. The problem seems to be a lack of evenness combined with poor adhesion.

The edges are completely different. Repeated sealing and sanding to remove the irregularities and fill the gaps until the surface becomes as smooth as the pressed surface. I found this takes at least 4coats of sealer and undercoat before trying a couple of gloss coats (for window sills).
__________________
regards Andrew T.
  Reply With Quote
Old 9th December 2007, 10:42 AM   #6
diyAudio Moderator
 
pinkmouse's Avatar
 
Join Date: Apr 2002
Location: Chatham, England
Surely not a repeat of all this again?

There are some very good threads on this topic already.
__________________
Rick: Oh Cliff / Sometimes it must be difficult not to feel as if / You really are a cliff / when fascists keep trying to push you over it! / Are they the lemmings / Or are you, Cliff? / Or are you Cliff?
  Reply With Quote
Old 9th December 2007, 12:47 PM   #7
John L is offline John L  United States
diyAudio Member
 
John L's Avatar
 
Join Date: Oct 2001
Location: Cary NC
Quote:
Originally posted by pinkmouse
Surely not a repeat of all this again?

There are some very good threads on this topic already.
Perhaps you can provide some links to the previous threads? I have been gone for quite a while myself, and am not up to speed on much that has already been written.

Another thought. Since there are threads that are stickey, and kept for posterity, perhaps we can also have one that goes over the art of finishing/painting/sealing?
  Reply With Quote
Old 9th December 2007, 01:05 PM   #8
John L is offline John L  United States
diyAudio Member
 
John L's Avatar
 
Join Date: Oct 2001
Location: Cary NC
I have mentioned this many times on several other forums, and perhaps a few here of late. There is only one REALLY good all around sealer, that goes well with practically any porus surface, and as an added bonus works as a supurb finish as well.

I am talking about "Shellac". All you need do is purchase a pound of flakes from an internet source, and go to your local Lowes/Home Depot/Ace, and get a gallon of denatured alcohol. Create between a one to two pound cut, make sure it is well dissolved, and then you can brush, use a loaded clothe, or even use a refillable spray can and spray it on. Just let it dry, which is quick, lightly sand the surface with 0000# steel wool, and you are ready to finish. It's that easy, and you simply Cannot screw it up, guaranteed!

Then place your mixed 'cut' of shellac in the refrigerator, to keep it in good shape, and bring it out when you need it.

There are simply too many wonderful things to say about shellac, that it is by far the very best sealer AND finisher on the market. Only if you are going to get alcohol or water on it's surface for an extended time, or put the finish on fire, will it let you down.

You can get shellac from right here. I use "orange" and "blonde", but there are others. The Orange makes a great stain too, and saturates just like a dye stain, so coverage is uniform, not like the pigmented stains that are about all you can find at the hardware stores. So with something like orange shellac, you will stain AND seal at the same time.

Saves time. And just about anything will go over shellac, unlike other applications.
  Reply With Quote
Old 9th December 2007, 01:10 PM   #9
diyAudio Moderator
 
pinkmouse's Avatar
 
Join Date: Apr 2002
Location: Chatham, England
Here's a couple that I remembered, searching will find others.

A solution to MDF expansion on joints, translams etc.

A 'how to' for High Gloss Finishing
__________________
Rick: Oh Cliff / Sometimes it must be difficult not to feel as if / You really are a cliff / when fascists keep trying to push you over it! / Are they the lemmings / Or are you, Cliff? / Or are you Cliff?
  Reply With Quote
Old 9th December 2007, 01:36 PM   #10
diyAudio Member
 
Join Date: Nov 2007
Default mdf paint

Thank you all!!

Now I have a better grip to start the project...

Thanks,

Joshua
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Really OT question about paint Conrad Hoffman The Lounge 14 22nd January 2008 08:28 AM
Help removing paint Shpoop Everything Else 5 22nd July 2007 04:46 PM
spray gun's paint larksp Multi-Way 3 3rd June 2007 02:49 PM
Paint steel chassis with the "aluminum paint" used on wire fence? vax9000 Tubes / Valves 2 23rd July 2006 01:14 AM


New To Site? Need Help?

All times are GMT. The time now is 01:33 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2