should I prime first?

trw88

I’ve got a small shed with T-111 plywood siding that was originally painted without primer and a single coat of cheap acrylic-latex paint less than two years ago. It still looks just fine. But since I’m the middle of a much larger painting job and using the same color but much higher quality acrylic paint, I figure it wouldn’t be that much more work to give the shed a second coat.



Should I use primer over the first coat?


If so, would it be okay to use an oil based-primer, of which I have plenty left over from a previous job? Or would I be better off with a water-based primer?


Thanks.

DIY_Diva

I probably would not use a primer, since you're painting it a similar color.

housepaintingny

You will want to prime any raw wood. Always prime bare surfaces, as primer helps promote adhesion of your paint

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Bob Guercio

Hi guys,

I'm planning on painting my bathroom ceiling with Benjamin Moore Ceiling paint; however, the current paint is a semigloss.

What is the best way of doing this? I'm wondering whether or not I need to prime first?

Thank you,
Bob

jsheridan

Hey Bob, only if you did any spot patching should you prime. Give it a light sanding, dust it off and go.
PS When you say ceiling paint in your bathroom, what type of ceiling paint, finish, are you talking about? Is it spec'd for bathrooms?

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trw88

Hijacked! Sounds like I'm ok not using primer though. Thanks DIY Diva.

housepaintingny

If you don't prime any raw wood, bare surface the paint will not adhere and fail. It will peel and flake off.

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trw88

housepaintingny...Right. But this isn't raw wood. The shed as already been painted. I'm just adding a second coat.

jsheridan

Sorry you had your post hijacked TRW. You don't need to prime any already painted surface. Just prepare the surface, wash, sand, whatever it needs and then paint. If the surface was old or extremely degraded, a primer coat is a good base for the next coat but short of that your fine.

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housepaintingny

I understand that. I was think that the shed may have dome loose/flaking paint that would need to be scraped off and those spots would then be primed.

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trw88

housepaintingny....Ohhhhh...Now I get it. The paint is actually still in excellent condition. A strong argument could be made that I'm crazy to put on a second coat at this point. But I'm in the middle of a bigger painting project with the same color and I'll have extra left over paint. So, I figure I may as well spend an extra hour on the shed doing it right.

Thanks jsheridan

painter162

Sand, prime, paint, paint.