Spray Tip Sizes and Pre-Catalyzed Lacquers

      Finishers discuss the uses of different tip sizes, and whether or not to thin lacquers when applying them. October 28, 2005

I am trying to spray a bar with my new Fineck Gravity Flow Gun. I am using Magnalac precatalyzed lacquer C144 14 Satin 35 with tips 1.3, and I also tried 1.5. I am not getting enough spray out of either tip. I considered taking the filter out does anyone have any suggestions?

Forum Responses
(Finishing Forum)
From contributor A:
If Magnalac has the same viscosity as Magnamax (30 sec Ford #4 at 77F) then you would need to use a 1.7 mm tip and thin it with 1-1/2 oz of standard thinner. I usually don't thin my Magnamax at all and I get good results.

From contributor B:
Before you buy a new tip, try taking the fluid filter out of the gun if it has one. You can lose a lot of flow. Use a cone strainer when you fill the cup.

From contributor C:
Im in the process of buying a few new guns and want to know which tips to use for what? I was told to buy a 1.3 for Magnalac, and a 1.8 for Campbell UltraStar. Is this true or should I just buy 1.7 for everything?

From contributor A:
To contributor C: You probably will have troubles with just one tip. I have three tips, and I wish I had one more for primers. I have a 1.5 mm, 1.7 mm and 1.9 mm. I also wish that I had a 2.2 mm for my Magnaclaw primer. I haven't used the 1.5 mm tip that came with my gun in awhile. I usually use my 1.7 mm for Magnamax clears and the 1.9 mm for Magnamax opaques. I don't use any thinners with the clears. But with the opaques, I have to thin 20-30% to get a good flow out of the gun and on the surfaces I am spraying.

From contributor D:
I am just starting to spray Magnamax and with my gravity gun. I have found the 1.8 tip seems to work pretty well. The 1.5 just didnt have the flow. I almost put the 2.2 in but the 1.8 is working well.

From contributor E:
Quite simply, if the Magnalac isn't coming out fast enough, you need to thin it. If it comes out too slowly you will either get orange peel or a rough dusty finish. Thin it with lacquer thinner a little bit at a time until it lies like glass. I am only experienced with it on a gravity cup gun, but I use it all the time with Magnalac. I find that thinning it makes it come out quicker and the passes are faster and more even. I use a 1.8 tip.

Would you like to add information to this article?
Interested in writing or submitting an article?
Have a question about this article?

Have you reviewed the related Knowledge Base areas below?
  • KnowledgeBase: Knowledge Base

  • KnowledgeBase: Finishing

  • KnowledgeBase: Finishing: General Wood Finishing

    Would you like to add information to this article? ... Click Here

    If you have a question regarding a Knowledge Base article, your best chance at uncovering an answer is to search the entire Knowledge Base for related articles or to post your question at the appropriate WOODWEB Forum. Before posting your message, be sure to
    review our Forum Guidelines.

    Questions entered in the Knowledge Base Article comment form will not generate responses! A list of WOODWEB Forums can be found at WOODWEB's Site Map.

    When you post your question at the Forum, be sure to include references to the Knowledge Base article that inspired your question. The more information you provide with your question, the better your chances are of receiving responses.

    Return to beginning of article.

    Refer a Friend || Read This Important Information || Site Map || Privacy Policy || Site User Agreement

    Letters, questions or comments? E-Mail us and let us know what you think. Be sure to review our Frequently Asked Questions page.

    Contact us to discuss advertising or to report problems with this site.

    To report a problem, send an e-mail to our Webmaster

    Copyright © 1996-2016 - WOODWEB ® Inc.
    All rights reserved. No part of this publication may be reproduced in any manner without permission of the Editor.
    Review WOODWEB's Copyright Policy.

    The editors, writers, and staff at WOODWEB try to promote safe practices. What is safe for one woodworker under certain conditions may not be safe for others in different circumstances. Readers should undertake the use of materials and methods discussed at WOODWEB after considerate evaluation, and at their own risk.

    WOODWEB, Inc.
    335 Bedell Road
    Montrose, PA 18801

    Contact WOODWEB

  • WOODWEB - the leading resource for professional woodworkers

      Home » Knowledge Base » Knowledge Base Article