Cruisers & Sailing Forums (http://www.cruisersforum.com/forums/)
-   Construction, Maintenance & Refit (http://www.cruisersforum.com/forums/f55/)
-   -   Primer Over Recent Paint (http://www.cruisersforum.com/forums/f55/primer-over-recent-paint-163336.html)

SF Bay Dude 23-03-2016 21:09

Primer Over Recent Paint
 
Recently painted my decks with awlgrip. I used a combo of sand and griptex for grit, but I didn't have enough paint to cover the sand adequately without seeing some color burn through. As I drove down 1200 miles and spent a month prepping, it's a little bit of bummer that I came up a gallon short :(

The deck is for all intents and purposes, done, but the very faint sand color annoys me. It's grippy though, and properly done with 5 coats down, starting with the hullgruard extra base coat, 2 coats of 545 primer, and 2 top coats of awlgrip.

The reason I'm wondering is I just did a huge sanding job, and don't want to fully repeat it! Plus with the sand in the paint, that means I've got to get it down pretty far again to get the base level of the paint.

Let's just say I wanted to throw on a few more coats. My real question is sanding. Do I need to do a full sanding if I re-coat with primer, or will it stick fast and hard without sanding? Has anyone laid down some 545 without sanding and had good results over time, or at some point, will I see premature failure?

Thanks.

Jim Cate 24-03-2016 02:22

Re: Primer Over Recent Paint
 
Dude, our resident expert on such things is Minaret. If he doesn't respond to your post, send him a PM... he's both expert and generous with advice.

Jim

unclemack 24-03-2016 03:00

Re: Primer Over Recent Paint
 
Definitely take advice from somebody like Minaret who'll likely know that paint.

I've never used awlgrip.

To give the surface a mechanical key maybe you could lightly cross-hatch it by hand with a brand new fine stainless wire brush - rather than actually sanding it and removing the grit.

Wash & dry the wire brush before use to remove any oil, tak-rag the surface before re-coating.

SF Bay Dude 24-03-2016 07:46

Re: Primer Over Recent Paint
 
I was thinking of a wire brush of sorts too. Maybe even getting once for the grinder - as they have some wire brush wheels - and giving it a pass. Hopefully that would serve.

minaret 24-03-2016 07:52

Re: Primer Over Recent Paint
 
Quote:

Originally Posted by SF Bay Dude (Post 2080037)
I was thinking of a wire brush of sorts too. Maybe even getting once for the grinder - as they have some wire brush wheels - and giving it a pass. Hopefully that would serve.



Scotch brite pads, wire brush fine, lots of T0008. Be thorough and it'll be fine.

unclemack 24-03-2016 08:13

Re: Primer Over Recent Paint
 
Quote:

Originally Posted by SF Bay Dude (Post 2080037)
I was thinking of a wire brush of sorts too. Maybe even getting once for the grinder - as they have some wire brush wheels - and giving it a pass. Hopefully that would serve.

Jeez, a wire wheel on a grinder will rip a recently painted surface to bits!! :eek:

All that's needed is to abrade the surface so it's not shiny... ScotchBrite pads would be fine used by hand, or on a slow buffer.

Grinders spin way too fast and friction heats/melts the painted surface.
5" angle grinder 11000rpm, 9" runs at 6600rpm.

Scaramanga F25 24-03-2016 13:36

Re: Primer Over Recent Paint
 
I have re-coated a painted deck one or two years later by just cleaning with TSP and a brush and another coat of Awlgrip.

Captndave1 24-03-2016 13:36

Re: Primer Over Recent Paint
 
I am getting ready to redo my non-skid, and I am using Scorpion truck bed paint. It is available an many colors and has an excellent rubberized nonskid that will las t for many years and is tougher than any paint.

cruisersfarm 24-03-2016 14:44

Re: Primer Over Recent Paint
 
Good lord I hope I am in time!!!

Get it on now!!!

24 hour recoat window.

cruisersfarm 24-03-2016 14:46

Re: Primer Over Recent Paint
 
And just use more topcoat where you don't like the discoloration. It'll hide well enough with another go around. No need for primer.

captlloyd 24-03-2016 18:55

Re: Primer Over Recent Paint
 
Quote:

Originally Posted by cruisersfarm (Post 2080360)
And just use more topcoat where you don't like the discoloration. It'll hide well enough with another go around. No need for primer.

Agreed, maybe just a light brush with a hand-brush and you a good to go. The sand should provide a good enough key for the paint. :popcorn:

SF Bay Dude 24-03-2016 19:51

Re: Primer Over Recent Paint
 
Quote:

Originally Posted by cruisersfarm (Post 2080356)
Good lord I hope I am in time!!!

Get it on now!!!

24 hour recoat window.

Wish that was the case. The paint is well set up; it's been on for 3-4 months now. :( Boat is in Mexico, but I am in San Francisco, CA. I went down for month to work on her, but came up shy by a gallon in the paint department. Aye! Another coat or two will hide the color, but the 24hr window is gone, hence the question.

Cool. I'll use wire brush, scotch brite pads, etc.

Prime again, or just topcoat?

Thanks!

minaret 24-03-2016 20:44

Re: Primer Over Recent Paint
 
Quote:

Originally Posted by SF Bay Dude (Post 2080498)
Wish that was the case. The paint is well set up; it's been on for 3-4 months now. :( Boat is in Mexico, but I am in San Francisco, CA. I went down for month to work on her, but came up shy by a gallon in the paint department. Aye! Another coat or two will hide the color, but the 24hr window is gone, hence the question.

Cool. I'll use wire brush, scotch brite pads, etc.

Prime again, or just topcoat?

Thanks!


Just topcoat should be fine.

Scout 30 25-03-2016 15:58

Re: Primer Over Recent Paint
 
I don't think a wire brush is a good idea. There should be a help line on the paint can. Give them a call.

Aaarrgh 26-03-2016 08:39

Re: Primer Over Recent Paint
 
Has anyone yet suggested a controlled application of a liquid de-glosser to provide a "profile" for adhesion (grip)? Other than the advice you will surely receive from the afore-mentioned paint "wizard" (title affectionately offered), I would certainly get the manufacturer's recommendation.


All times are GMT -7. The time now is 06:25.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2018, vBulletin Solutions, Inc.


ShowCase vBulletin Plugins by Drive Thru Online, Inc.