Latex over Oil?

[phone man]

I'm in the painful process of repainting my interior. I have already purchased latex paint mostly because of ease of cleanup. The problem is the baseboard/trim/doors are painted with oil based paint. I have tried to sand them to rought the finish, but it I had to put about 3 coats of new paint. If I were to buy a primer to cover the oil based paint, would sanding still be needed or would an oil based primer be easy to cover with latex? Thanks.

[painter]

Yes you can paint over oil-based paint with latex paint without sanding, but you will need a bonding primer. There is one in a blue can available at most paint stores and mass merchants. Can’t give you the name on this forum, but I can tell you it is easy as 1-2-3. The key is the surface must be clean – free of wax and or oil.

This product is also pigment, so it will reduce the number of coats required to cover harsh colors. The primer can also be tinted towards the color of the topcoat, which should also reduce the number of coats needed.

[phone man]

Thanks...

[Sherina]

I too am in the process of repainting most of my interior. However, not knowing any better, I have already painted latex paint over oil-based paint on the trim in one of my rooms and I can now scrape it off with my fingernail! Is there any way to correct this problem other than sanding all the trim and starting all over again???

Sherina

[HayZee518]

Scratch the base with a fine grit paper - yes its a lot of work but you need to break the glaze to get paint to adhere to it. Get hold of Zissner B.I.N. sealer. It is an alcohol based white primer. Then do what you have to.

[leone184]

I would highly recommend you use an oil-based primer over the trim. The latex 1-2-3 primer would be okay if the surface is sanded well, but using an oil-based primer will save you that step. Some oil primers like Kilz will dry in about one hour, and will easily take a latex topcoat.
** Don't use a pigmented shellac primer, these are never good under latex products as they have problems properly adhering to it. These products are for sealing bleeding stains, and were never meant to be used as an all-purpose primer. (No matter what the label says)

leone184