Is primer necessary?

TEST ON SCRAP FIRST! If your question is about repair work, either regluing or refinishing, please post it in our Repair Section.

Is primer necessary?

Postby Mike Kinny » Tue May 28, 2019 9:43 am


What is a primer and why is it necessary to apply before lacquer? This is to finish a classical guitar.

Mike Kinny
Posts: 8
Joined: Fri May 24, 2019 12:49 pm

Re: Is primer necessary?

Postby Barry Daniels » Tue May 28, 2019 10:07 am

MIMF Staff
Barry Daniels
Posts: 2340
Joined: Thu Jan 05, 2012 10:58 am
Location: The Woodlands, Texas

Re: Is primer necessary?

Postby David King » Tue May 28, 2019 6:04 pm

Unless you need a filler coat, i.e. not a primer but something to fill the open pored grain in certain woods like mahogany, walnut, East Indian Rosewood and many others.
David King
Posts: 2615
Joined: Sat Jan 07, 2012 10:01 pm
Location: Portland, OR

Re: Is primer necessary?

Postby Clay Schaeffer » Wed May 29, 2019 8:28 am

Primer/sealers reduce the number of top coats that need to be applied to obtain a smooth finish. You can "self seal", which is to say spray additional coats of top coat until it fills the pores of the wood.
Some guitar builders use epoxy resins to fill the pores of the wood and top coat over that.
Clay Schaeffer
Posts: 1324
Joined: Fri Jan 06, 2012 12:04 pm

Re: Is primer necessary?

Postby Rodger Knox » Wed May 29, 2019 2:58 pm

A primer is a base coat usually employed to improve adhesion between the surface and the top coat. A sealer is similar, but it's purpose is to seal the surface. A pore fill is a little different, it's purpose is to seal the pores in wood that has pores. Primers are not generally used on wood, while pore fill and a seal coat are common under lacquer. Classical guitars traditionally have a French polish finish, which is a hand applied spirit varnish.
A man hears what he wants to hear, and disreguards the rest. Paul Simon
Rodger Knox
Posts: 497
Joined: Mon Jan 09, 2012 2:02 pm
Location: Baltimore, Maryland

Return to Glues and Finishes

Who is online

Users browsing this forum: No registered users and 2 guests

Your purchase from these sites helps support the MIMForum, but only if you start at the links below!!!
Amazon music     Amazon books     Amazon tools     Rockler tools     Office Depot    

The MIMF is a member-supported forum, please consider supporting us with a donation, thanks!
 • Book store • Tool store • Links •