Yesterday's Tractor Co. Parts for Farm Tractors - Compare our Prices!
Click Here or call 800-853-2651 
   Allis Chalmers Case Farmall IH Ford 9N,2N,8N Ford
   Ferguson John Deere Massey Ferguson Minn. Moline Oliver
 FAQFAQ   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups   Traditional YT Forum ViewClassic View   RegisterRegister 
 ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in 

PPG Primer, catalyst and associated questions


 
Post new topic    
View previous topic :: View next topic  
Author Message
Luke Rhonemus
Regular


Joined: 03 Oct 2000
Posts: 35


Report to Moderator

PostPosted: Tue Apr 23, 2013 5:59 am    Post subject: PPG Primer, catalyst and associated questions Reply to specific post Reply with quote

We are in the middle of restoring a Farmall Regular and are using PPG Epoxy primer and reducer. Have never sprayed this before and wanted to know a few things. First, I was informed that it needs painted after 5 hours, but should be painted immediately or else it needs scotch brited completely. Can it be wet sanded in the mean time to provide a smoother surface? Also, what ratio of reducer to primer do you recommend for the best job? And lastly, what air pressure should the gun be operated at to shoot this type of primer? Any advice would be appreciated. Thanks!
 
Back to top
View user's profile
BruceS.
Guest






Report to Moderator

PostPosted: Tue Apr 23, 2013 6:37 am    Post subject: Re: PPG Primer, catalyst and associated questions Reply to specific post Reply with quote

I'll chime in altho' others with way more experience will as well. I've worked with just what your working with and here's what I know.
1. Ratio of primer/catalyst is 2:1. I throw in a little primer just to get it to flow thru the gun. There is no ratio given for primer as reducer is not called for. You have about a 4 day window to topcoat, otherwise you must scuff with scotchbrite and reshoot primer. DO NOT prime/paint below 70 degrees and preferably low humidity. On a nice day you can topcoat within one hour of priming. (at least i did with no bad results.)
2. I set the compressor at about 75 lbs. and the gun at about 20 lbs. Worked for me.
3. the primer is non sandable. If your prep work on the tractor is first rate , you'll come out with a nice smooth finish with the primer. The metal prep work, btw, is 90% of the process.
4. I strongly urge you to get a supplied air system. Your health is more important than painting the tractor.
My .02.
 
Back to top
B-maniac
Tractor Guru


Joined: 06 Jan 2006
Posts: 3890
Location: Mt. Pleasant , MI.

Report to Moderator

PostPosted: Tue Apr 23, 2013 10:38 am    Post subject: Re: PPG Primer, catalyst and associated questions Reply to specific post Reply with quote

I am a PPG guy and don't usually go for any paint lines "economy" version but in the case of epoxy I use the PPG Omni version of their famous epoxy primer. It is about half- two thirds price and it handles exactly the same and I couldn't tell the diff. I use no reducer in epoxy. It may seem to go on a little rough but just turn down the air pressure and dump it on smooth. I think one can fudge on the re-coat window a little and even go to 7 days without scotchbrite. Sounds like ya got a good handle on it. RB
 
Back to top
View user's profile
CNKS
Tractor Guru


Joined: 10 Mar 2002
Posts: 18077


Report to Moderator

PostPosted: Tue Apr 23, 2013 1:34 pm    Post subject: Re: PPG Primer, catalyst and associated questions Reply to specific post Reply with quote

If you are using HVLP there is no easier primer than epoxy to use. As stated use 2 parts primer to 1 catalyst (the catalyst does NOT contain isocyanates). Use no reducer. Use the air pressure at the gun according to the amount stamped on the gun or in the instructions. Do not experiment because HVLP guns vary from about 30 to 50 psi, depending on the manufacturer. You have 3 days to topcoat the Omni version or 7 days to do the expensive version, otherwise you scuff and reapply. It can have surfacer or topcoat applied after 30 minutes. You do need supplied air for the hardener used in urethane, if that is what you are going to use.
 
Back to top
View user's profile
Luke R
New User


Joined: 10 Jan 2010
Posts: 15


Report to Moderator

PostPosted: Fri Apr 26, 2013 7:22 am    Post subject: Re: PPG Primer, catalyst and associated questions Reply to specific post Reply with quote

You mentioned hardener. Should I put hardener in with the epoxy? We have the omni version. Also, I was wondering if it is sandable at all after applying? It sounds like it is set as soon as you spray for paint. Probably wouldn"t be good to use with the sheetmetal then? Thanks for the advice
 
Back to top
View user's profile
CNKS
Tractor Guru


Joined: 10 Mar 2002
Posts: 18077


Report to Moderator

PostPosted: Sat Apr 27, 2013 12:26 pm    Post subject: Re: PPG Primer, catalyst and associated questions Reply to specific post Reply with quote

Epoxy has to have the catalyst or it won't work. it is ideal for sheet metal, cast or whatever. It is NOT sandable. On sheet metal it will give a good enough finish when top coated. For best results use a sandable surfacer over the epoxy. On relatively smooth surfaces such as battery boxes, generators, starters etc, or anything that is not the hood, gas tank, grill, etc, epoxy is fine when topcoated. A sandable primer, high build or otherwise does not adhere as good to the bare metal as epoxy. It is the only true primer that I use.
 
Back to top
View user's profile
Luke R
New User


Joined: 10 Jan 2010
Posts: 15


Report to Moderator

PostPosted: Sat Apr 27, 2013 6:26 pm    Post subject: Re: PPG Primer, catalyst and associated questions Reply to specific post Reply with quote

Can you spray multiple coats? If so, what are the correct steps to ensure it looks good? Again, thanks to everyone.
 
Back to top
View user's profile
Display posts from previous:   
Post new topic    Yesterday's Tractors Forum Index -> Paint and Bodywork All times are GMT - 8 Hours
Page 1 of 1

 
Jump to:  
TRACTOR   PARTS TRACTOR   MANUALS
Same-Day Shipping! Most of our stocked parts ship the same day you order (M-F).  Expedited shipping available, just call!  Most prices for parts and manuals are below our competitors.  Compare our super low shipping rates!  We have the parts you need to repair your tractor.  We are a Company you can trust and have generous return policies!   Shop Online Today or call our friendly sales staff toll free (800) 853-2651.

YT Home  |  Forums Home

Copyright © 1997-2014 Yesterday's Tractor Co.

Powered by phpBB © 2001, 2005 phpBB Group

All Rights Reserved. Reproduction of any part of this website, including design and content, without written permission is strictly prohibited. Trade Marks and Trade Names contained and used in this Website are those of others, and are used in this Website in a descriptive sense to refer to the products of others. Use of this Web site constitutes acceptance of our User Agreement and Privacy Policy

TRADEMARK DISCLAIMER: Tradenames and Trademarks referred to within Yesterday's Tractor Co. products and within the Yesterday's Tractor Co. websites are the property of their respective trademark holders. None of these trademark holders are affiliated with Yesterday's Tractor Co., our products, or our website nor are we sponsored by them. John Deere and its logos are the registered trademarks of the John Deere Corporation. Agco, Agco Allis, White, Massey Ferguson and their logos are the registered trademarks of AGCO Corporation. Case, Case-IH, Farmall, International Harvester, New Holland and their logos are registered trademarks of CNH Global N.V.

Yesterday's Tractors - Antique Tractor Headquarters