Browse Forums Interior Decorating Lounge 1 Mar 13, 2012 9:08 pm Hello, I have stripped my 50 year old door frames with a heat gun and sanded them to within an inch of their lives (or perhaps, within an inch of MY life). They were previously painted with very old oil based paint. I now wish to re-paint them with oil based gloss white. What I need to know is, do I need to apply a coat of primer? Or can I just paint straight onto the bare(ish) timber? There are still minor imperfections in the timber, would a primer help conceal them or will sanding between coats take care of that (I plan to do 3 coats)? If I need a primer or undercoat (something other than the paint itself) can anyone recommend one? I am painting with a brush (as I did with the architraves which came out OK). Any help is appreciated. Re: Oil Based Enamel - Priming? 2Mar 14, 2012 5:58 am I would usually undercoat first, and as you said, sand between coats. use Dulux 1 Step - Primer, Sealer & Undercoat This should be enough, make sure to use a good paint brush. Internal and External Building and Colour Consultant Online - Worldwide http://www.denovoconcepts.com Re: Oil Based Enamel - Priming? 3Mar 14, 2012 2:40 pm As michelle stated you definately need to undercoat, the undercoat not only fills minor inperfections it also provides a bond between paint and bare timber. Prior to painting the undercoat fill any imperfections with a timber filler and then sand back, also for a perfect "brush stroke" free finish I use a small foam roller on all the flat surfaces, so a combination of brush and small roller, also between coats I use 3M scotchbrite. Re: Oil Based Enamel - Priming? 4Mar 16, 2012 2:25 pm Would I be able to use a water based primer, even though my paint is oil based? Or does oil based paint require an oil based primer ? I already own a can of Taubman's Easy Coat Prep so it would be great if I could use that. Re: Oil Based Enamel - Priming? 5Mar 16, 2012 6:43 pm Human Potato Would I be able to use a water based primer, even though my paint is oil based? Or does oil based paint require an oil based primer ? I already own a can of Taubman's Easy Coat Prep so it would be great if I could use that. General rule of thumb is no, you can paint both water and oil based paint over oil based primer but you shouldn't paint oil based paint over water based primer, having said that I have painted oil based paint over water based primer, you just need to be sure the primer has a good bond to the timber ie; no flaking or peeling and make sure you sand the primer with 120 grit to help with adhesian. The other problem with timber is it can leach tannins, oil based primer and paints help to block the tannins leaching through, so might be just a better idea to use an oil based primer. Re: Oil Based Enamel - Priming? 6Mar 18, 2012 8:13 am Human Potato I now wish to re-paint them with oil based gloss white. I'm sure you are well aware of it, but just to reiterate that your white (IF, of course, it is indeed a pure, ie. non-tinted white) will NOT stay white for long. Oil based white paint will darken/yellow quite quickly and will continue to do so for quite a while. (Water based paint will not.) Also, you would have problems painting with a water based paint over an oil based paint - the paint wouldn't quite stick and hold (but the other way around is generally quite OK). Areas painted (or primed) with oil based paint should be sanded a bit in order for water based paint to adhere. My signature is distracting people from my wise posts ... Re: Oil Based Enamel - Priming? 7Mar 18, 2012 8:46 pm Just as another thought since you seem to want enamel, have a loom at the water based enamels. Have virtually all the plusses of enamel paint, but with the advantages of water based. The glosses etc are just a little less than the oil based but much better than acrylics. Settlement 1/2/12 New Shed 23/3/12 Slab poured 27/3/12 Frame complete 4/5/12 Roof complete 1/6/12 LOCKUP 29/6/12 Our new build blog http://kareenhillsownerbuild.blogspot.com/ The yellowing mainly occurs to white or very light colours. 1 2935 This link might answer your question. I had the same issue and it turned out to be the roller. https://www.sherwin-williams.com/painti ... %20coating. 4 18140 I'm about to put down some Merbau. Is it necessary to oil underneath the boards before laying? 0 1930 |