Go Back  The Hull Truth - Boating and Fishing Forum > BOATING FORUMS > The Boating Forum
Reload this Page >

Prepping Outdrive for Anti-Foul Paint? Bare Aluminum prep in some areas

Notices

Prepping Outdrive for Anti-Foul Paint? Bare Aluminum prep in some areas

Old 06-04-2019, 01:51 PM
  #1  
Member
Thread Starter
 
Join Date: Jun 2011
Location: Connecticut
Posts: 58
Default Prepping Outdrive for Anti-Foul Paint? Bare Aluminum prep in some areas

I need to paint my outdrive with anti-foul paint since I float in salt for the season. I purchased a boat that was in freshwater all of its life. Looks like maybe the previous owner rubbed off the paint on the lower portion of the outdrive? Looks like it may have rubbed down to the bare aluminum and then there is some primer in some areas, before the factory finished paint higher up.

Since most of the drive has its factory finish in place, I am focusing on how to prep the bottom of the drive as you can see in the photos below. I'm not doing a factory finish paint job here, instead its prepping enough to get anti-foul to stick.

I'm planning to anti-foul the drive but I've read that paint will not stick unless I go through an aluminum prep process. Is this correct? What are my options?
-Would a zinc chromate primer spray work enough to help the anti-foul bond? This would obviously be the easiest if I could lightly scuff, prime with this, and then paint over it
-Is some other self-etching primer product capable of bonding enough to let the anti-foul stick on top of it?
-Or do I need to go the whole process of etching/Alodine/then prime? I saw a detailed post here on the forum but this is geared towards an entire paint job, not anti-foul and is definitely very involved:
Painting an outdrive

Any tips appreciated, I've never had to paint an aluminum outdrive that didn't have its factory finish intact. Pictures attached.



enginehead is offline  
Old 06-04-2019, 03:13 PM
  #2  
Senior Member
 
Join Date: Jan 2011
Location: Pgh Pa
Posts: 14,831
Default

Doesn't look to be bare metal

Interlux Primicon primer using 433 thinner for brushing on
Paint then use whatever anti fouling you want

Name:  qeCgDNS.jpg
Views: 76
Size:  208.6 KB
Thalasso is offline  
Old 06-04-2019, 07:30 PM
  #3  
Member
Thread Starter
 
Join Date: Jun 2011
Location: Connecticut
Posts: 58
Default

Originally Posted by Thalasso View Post
Doesn't look to be bare metal

Interlux Primicon primer using 433 thinner for brushing on
Paint then use whatever anti fouling you want

Attachment 1100469
Thanks for the feedback, your drives look great! Do you trailer your boat or keep in the water? Fresh or Salt water? Also curious what did you spray/paint your props with?

So you don’t think that is bare aluminum on my drive? Think that’s still the factory primer coat? So with the Primocoat did you buy a quart of it and thin it down with the 433 to make it easier to brush?
enginehead is offline  
Old 06-04-2019, 11:09 PM
  #4  
Senior Member
 
Join Date: Apr 2006
Posts: 5,025
Default

Etch prime any bare spots. Then 3 coats of a good primer compatible with your antifoul. Those primers coats help keep the salt away from the aluminium and in the long run are worth the effort of doing IMO.
Aliboy is offline  
Old 06-05-2019, 07:32 AM
  #5  
Senior Member
 
Join Date: Jan 2011
Location: Pgh Pa
Posts: 14,831
Default

Originally Posted by enginehead View Post

Thanks for the feedback, your drives look great! Do you trailer your boat or keep in the water? Fresh or Salt water? Also curious what did you spray/paint your props with?

So you don’t think that is bare aluminum on my drive? Think that’s still the factory primer coat? So with the Primocoat did you buy a quart of it and thin it down with the 433 to make it easier to brush?
I don't think that is bare aluminum. Looks more like factory primer
Yes. You don't have to but the primicoat is pretty thick for brushing. wipe the surface first with the 433 before sanding. I used a 3M medium grit drywall sanding sponge for sanding joint compound to mar the surface before using Primocoat
The drives are 07 kept in fresh 6 months of the year Props haven't been painted with anything. I do get in the water a few times a season with a rag and wipe them down
After the Primocoat i sprayed them with
Volvo Penta SX Silver Gray Metallic Paint Volvo Penta SX Silver Gray Metallic Paint



If you want to use a primer just get some zinc chromate
https://www.jamestowndistributors.co...t.do?pid=64232

Last edited by Thalasso; 06-05-2019 at 07:38 AM.
Thalasso is offline  

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 On
Refbacks are Off


Thread Tools
Search this Thread