Getting ready to paint

Cox

Seaman
Joined
Sep 19, 2008
Messages
65
So I'm getting ready to paint my 16' Tracker and I've read a ton about painting aluminum but I want to make sure that the various combinations of what I've read along with some of the specs on the paint that I'm using (Rustoleum Marine Top Side) all coincide with the process I'm planning to use. First off, here's the boat (before):
http://i801.photobucket.com/albums/yy294/tabsher1/Boat and Trailer Restoration/100_1942.jpg

And here's how it looks today, after having stripped all the decals and reg. numbers:
IMAG0072.jpg


There are a few spots of bare aluminum but the rest is the original paint and seems to be in pretty good shape.

Planned Process:
1.) Wash with Ammonia/Water solution and let dry
2.) Spot-spray bare aluminum with Zinc Chromate Primer
3.) Rough-up surface with 80 grit sand paper
4.) Wash to remove residue
5.) Apply 1 coat of Rustoleum Metal Primer and allow to dry overnight
6.) Apply first Top Coat (Roll and Tip), thinned with 5% mineral spirits and allow to dry overnight
7.) Sand lightly with 220 grit and wipe with tack cloth
8.) Apply Second Coat
9.) Repeat, as needed

So just a couple of questions:
Do I need step 5 at all, or can I get away with spot priming the bare aluminum and then applying top coat on original scuffed up paint? Is there really a big advantage to priming before?

If I am going to prime, do I apply the primer using Roll and Tip as well and do I thin the primer 5% just like the top coat?

Lastly, when the final Top Coat is finished (assuming 2 coats) am I done or is the FINAL step sanding with a very fine sandpaper to bring it to a shine??

Any help is appreciated. I just don't want to blow it at this stage in the process.
 
Last edited by a moderator:

Bob_VT

Moderator & Unofficial iBoats Historian
Staff member
Joined
May 19, 2001
Messages
26,066
Re: Getting ready to paint

Change your Step 1 to wash down with vinegar not ammonia.

The Z chromate is really a light coat and sanding will quickly strip it .....it usually does not need to be sanded ;) (it costs too much money to sand off!)

If you have scuffed up the old paint, touched the bare spots with zinc chromate..... you can skip the next layer of primer.
 

osborn159

Petty Officer 1st Class
Joined
Feb 27, 2010
Messages
383
Re: Getting ready to paint

i see bob got ya fixed up good, i would switch steps 2-3 scuff then prime and 80grit sounds pretty aggresive for painting, read the intructions on the can, im using pettit they recommend scuffing w/ either 120 or 220
good luck sounds like you got it under control
 

ezmobee

Supreme Mariner
Joined
Mar 26, 2007
Messages
23,767
Re: Getting ready to paint

I used scotch-brite pads in prep for Easypoxy. They did a very good job of scuffing.
 

jbjennings

Captain
Joined
Jul 18, 2007
Messages
3,903
Re: Getting ready to paint

I like to clean my bare aluminum with acetone. DO NOT spray the primer on a day with high humidity!!!!!!!!!!! Over 70 degrees and as low humidity as possible. It's tough to get primer to stick good to aluminum. It has to be spotlessly clean. Follow the same low humidity guidelines with the paint. Make darned sure that your paint is compatible with your primer, or you will NOT be pleased when it wrinkles up.
GOod luck and nice boat,
JBJ
 

MD746

Cadet
Joined
Feb 19, 2010
Messages
26
Re: Getting ready to paint

Look into epoxy primers, when sprayed it dries a lite green color and its self ecthing I works real good on aluminum or and bare metal.
 
Top