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Re: Duco finish procedure?

Unread postPosted: Mon Jun 17, 2013 4:28 pm
by bigfoot
During material prep, and after primer, do you sand until 220-240 grit?

Re: Duco finish procedure?

Unread postPosted: Mon Jun 17, 2013 8:36 pm
by moji
bigfoot wrote:During material prep, and after primer, do you sand until 220-240 grit?


If your going to putty your work then no need. If its the final primer before the color coat then get it as smooth as you can.

Re: Duco finish procedure?

Unread postPosted: Mon Jun 17, 2013 9:08 pm
by bigfoot
Thanks Moji.

Do you use ROS for your work, or just handsanding? What type of sandpaper do you use?

Re: Duco finish procedure?

Unread postPosted: Mon Jun 17, 2013 9:48 pm
by moji
If the area to be painted is large then i use the ros, but usually i go handsanding using a sanding block. I use mirka gold for the ros, although its up to 220 grit only. For handsanding its usually 3M or mirka. How's your duco painting coming along?

Re: Duco finish procedure?

Unread postPosted: Tue Jun 18, 2013 12:09 am
by bigfoot
I'm still finishing with the putty stage, hopefully be able to primer again tomorrow weather permits.

Re: Duco finish procedure?

Unread postPosted: Tue Jun 18, 2013 6:08 pm
by Violaine
duco finish....

the labor intensive finishing...longer exposure to health related risks.

problem ko sa duco..yung mga corners ng cabinet doors..nag di dip...dahil sa poor primering..these are the critical areas.

Re: Duco finish procedure?

Unread postPosted: Sat Jun 22, 2013 12:58 am
by bigfoot
Is it ok to apply Acrylic lacquer over lacquer primer?

Re: Duco finish procedure?

Unread postPosted: Sat Aug 08, 2015 2:34 pm
by nick
moji wrote:Found my reply on an old thread, so i'll post it here too:

For duco/ lacquer finish the standard finishing schedule goes like this:
Sand plywood to around 150- 180 grit
Spray a coat or two of lacquer primer
cover the whole panel with polituff or other polyester putty
sand down and smooth, reapply polituff if needed
spray a coat or two of lacquer primer
apply lacquer putty
sand down and smooth, reapply lacquer putty if needed
spray a coat or two of lacquer primer
if satisfied with the smoothness proceed to spray the color coat, then clear coat if needed.

If you desire to use acrylic lacquer, the process is similar to lacquer but the materials differ,
Sand plywood to around 150- 180 grit
Spray a coat or two of epoxy primer
cover the whole panel with polituff or other polyester putty
sand down and smooth, reapply polituff if needed
spray a coat or two of epoxy primer
apply glazing putty
sand down and smooth, reapply glazing putty if needed
spray a coat or two of epoxy primer
if satisfied with the smoothness proceed to spray the color coat, then clear coat if needed.


Lacquers in general were made for automotive use. Nitrocellulose lacquer is the regular lacquer commonly found today. Acrylic lacquer is a step or two higher as it is supposed to have better properties than regular lacquer, it is also more expensive. Its thinner is also much stronger than regular lacquer. 1.8mm tip is the recommended tip size for spraying primers especially high build primers


How long do you air dry polituff? It seems that my paint laquer based is not sticking to the polituff very well, when i painted the panel, the part that have laquer primer and putty is peeling.
What do i do with it? Do i need to let the polituff dry for around two days before applying laquer primer?

Re: Duco finish procedure?

Unread postPosted: Sat Aug 08, 2015 8:13 pm
by timber715
Nick, Polituff ba gamit mo na brand na masilya? Sorry but I do have to ask, how much of the hardener do you use (red stuff) and how thick do you apply them?
Normally applied in thin layers as you build up to the desired thickness in 10 minute intervals is a good practice. It should dry overnight wherein sanding is done and should come out powdered.

Re: Duco finish procedure?

Unread postPosted: Sat Aug 08, 2015 11:21 pm
by nick
@ timb, yes i use polituff... i mix the hardener with the recommended ratio by the manufacturer. do i need to put more hardener?