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Latex paint over oil

26K views 51 replies 25 participants last post by  finishesbykevyn  
#1 ·
Hi everyone,

I got a new project to paint someone's house. The doors and trim were previously painted in an oil based paint. Usually I would sand, clean with TSP and then paint with my latex paint. However, in this job there's a ton a trim and doors and I would be spending a couple days just doing the prep.

Does anyone know of a primer (non oil based) that might save some time? A painter friend of mine recommended problem solving primer but I've never tried it before.

Any thought?
Many thanks in advance
-Coop
 
#4 ·
Nothing replaces the importance of sanding if you're transitioning from oil to latex. You could go a little lighter on the sanding as long as you've knocked the gloss off, and clean with Krud Cutter or liquid sanding de-glosser. Anything else is a gamble in regards to longevity IMO.
 
#8 ·
I can tell you first hand that's not true. Did a job in January liquid de-glossed and used Pro-Industrial. Guess who's going back to scrape and sand it all off. This guy, never again shoulda known better. :vs_cry:
 
#11 ·
Rbriggs82 said:
I can tell you first hand that's not true. Did a job in January liquid de-glossed and used Pro-Industrial. Guess who's going back to scrape and sand it all off. This guy, never again shoulda known better. :vs_cry:
I find it hard to beleive, we use it all of the time now, right now actually.
It's kinda a issue for us over the years. The oil change thing. Virtually all of the trim we deal with. Repaint wize, was done in oil, not some of it. All of it, commercial it was all anybody used. The switchover was a mess,
The pro industrial I just know it grabs.
Now. We don't I have never actually used a deglosser. I dunno. Maybe there is the jamb up? Truthfully. Prep is most often a light sand with a duster.
And hey. I don't 'really care' I just hate to see the fellas killing themselves over nothing. Wasting a whole coat? Pretty big
The oil to water based thing hasn't been a issue for years now
I'd look at the deglosser I really would. You don't need it, therefore? It can only hurt you.
Light sand. Dust and paint,
 
#23 ·
California Ultraplate if you can get it. Thirty one years selling paint and it is the only paint i have every seen that can stick right on glossy alkyd paint without a primer.
My sales floor displays were painted with gloss Rustoleum 10-15 years ago at a previous paint store. When i bought them i cleaned them, lightly sanded them, and put a coat of Ultraplate on them. I defy anyone to get it to peel off. I have had twenty to thirty painting contractors try and fail. It is a urethane modified acrylic and any of you that have used the XIM UMA already know how well that resin package works. The Ultraplate and cali's Grip Coat primer use the same UMA resins.
 
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#25 ·
Anybody have recent experience with Gripper--over oil? I remember using it many, many moons ago when it first hit the shelves....ho wanted it on her tile. I was skeptical to say the least but was very impressed at the bond (it was bonded when I got paid anyway...no idea how it held up over the years..lol) I've been thinking about using it again as sw no longer carries xim...and it is less expensive. No real comparison, I suppose but, hey-thought I'd throw it out to you guys. Now I'm bracing for the backlash (duck and cover!!)
 
#36 ·
I recently did a test using multiple primers on a metal door that had been painted with Industrial Enamel and still had a high gloss finish. Gripper, 123, Seal Grip all performed about the same on the next day scratch test. UMA took a little more effort to scratch off. SW Procryl would not scratch off even with a 5 in 1.
 
#44 ·
Heres a tidbit for anyone interested. Sw has come up with their own version of xim. Saw it on the shelf today. I know it's comparable and is just as good as xim in the bonding dept. A few months ago I was asked to demo the prototype on the tiles in front of the store. (Been nagging them for a while to get rid of the gawd awful green tiles that sooo didnt match anything else, haha)Did half with xim. Half with the science lab stuff (new sw product) sw brand was a little heavier bodied and wasn't AS smooth as xim but a good product imo. 1 hr later, tried scratching both off with a key. Then a 5n1...wouldn't budge. They may have tweeked a few things before it hit the shelves, not sure...interested in trying it again though. I've stuck to xim (it's expensive tho) on some things, but just wondering about how you guys deal with conversion. Sounds like we're all still in the same boat. I haven't seen seal grip in a while. I forgot that I really liked that product...there's gotta be a less expensive way that's comparable to coverstain in the $ dept.. .HO's aren't excited about oil usually..especially with Littles around. Thanks for the input! :)
 
#48 ·
I just recently tried Frazee Aro-thane from Sherwin Williams to try to skip the priming process for converting oil to water base and it worked great. I did a exterior siding job and I sprayed a interior kitchen inside and outside of the cabinets as well after sanding off the gloss of course and it worked great. They picked a pure white for the trim so that was 3 coats mandatory to look right .