-
what paint do i use for different substrates?
Hello,
I was wondering the methods that some of you use when painting a substrate, be it MDO Plywood, aluminum, etc. and the type of paint that you use?
I ask because I have had some finish smoothness/vinyl adhesion problems on my paint. I have experimented a little with a few different types of paints , latex and oil-based and cannot get the desired results.
I have used a paint roller and get a textured finish everytime, cannot get it totally smooth. And I have used a spray gun with dilluted paint and it takes a lifetime to dry. I have had a few distasters with vinyl peeling off the painted surface a month or two later 😳 and would hate for this to happen again. Any advice on this would be highly appreciated as at the moment, I find myself avoiding painting the backgound of a sign or even suggesting it to a customer because of this problem. (?) (?) (?)
Thanks!
Doyle
-
5 Replies
-
Hi Doyle
I paint plywood 8’x4’s as follows:-
First coat of thinned primer with paint roller.
Second and third coat, undercoat using same roller de-nibbing between coats, store the roller in a plastic bag overnight.
Fourth or top/gloss coat with a foam roller after de-nibbing. After rolling you may need to run a brush over the paint lightly to rid it of air bubbles but they normally dissapear.
As for texture I quite like the slight orange peel effect.
Aluminium:- After flatting down:-
One undercoat of chosen colour with foam roller.
De-nib and topcoat with new foam roller.
To paint vinyl:-
Scothbrite vinyl and wipe with meths then straight on with chosen colour using a foam roller.
With all these methods I would have the substrate vertical to stop airbourne s**t and dirt falling on them
Hope this helps
Neil
-
Thanks for the info. May I ask what type of paint do you use? Also does flatting down mean to scuff the surface with a scotchbrite? Any advice is much appreciated.
Thanks!
Doyle -
I use 1-Shot lettering enamel, after priming with exterior latex & sanding.
(I’m talking about a wooden sign)
I roll it on with a foam roller, then make the last pass almost a smear to knock down the bubbles. I added a bit of Penetrol to my paint the other day cuz it was so hot and it helped it to flow out.
Any irregularities can be excused to the customer as that “Custom Painted” look 😉
If I were using aluminum, and couldn’t buy the color I need (only .040 comes in colors here) I might pay an auto body shop to spray it. That could be factored into the price of the sign.
Alumalite is a nice substrate & comes in a good variety of colors, but it is pricey.
Perhaps you could flood coat the substrate with vinyl?
And another thing….I have never had any success whatsoever with vinyl lettering adhering well to a latex background.
Good Luck.
Love….Jill -
Thanks so much for all the info Jill & Neil. I wil try some of your methods next time I paint. Have a good weekend!
Doyle
-
“After rolling you may need to run a brush over the paint lightly to rid it of air bubbles”
I’m agree this is a key factor of sticking vinyl on to surface
quote :
Log in to reply.