Author Topic: Interior Door - Water-based products over existing oil-based  (Read 569 times)

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Offline mkurtis

  • Posts: 6
Interior Door - Water-based products over existing oil-based
« on: November 05, 2018, 09:09 PM »
I am looking to repaint a wood six panel interior door. The door was previously painted approximately 15 years ago with what I believe is Benjamin Moore Satin Impervo, an oil-based product. The paint is still in good shape except in high wear areas around the door knob and edges. I would like to repaint the door, preferably with a water-based product I can spray with a Fuji Q5 system.

I'm unsure what preparation would be required to put a water-based product over the oil-based. Does the door have to be stripped to bare wood? Assuming proper preparation, would a product like Kem Aqua Plus be a good selection for this application? Both existing color and new color are white.

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Online tjbnwi

  • Posts: 5730
  • Cedar Tucky Indiana
Re: Interior Door - Water-based products over existing oil-based
« Reply #1 on: November 05, 2018, 10:03 PM »
Clean well with Krud Kutter

Sand well with 240,

Clean again,

Prime with, Smart Prime, Pro Bond, Stix, etc....

Sand between coats,

If you really want to use KA+, use Surfacer inlue of primer,

Sand between coats,

The surfacer is a very bright white, shooting clear KA+ probably MRE over it makes a really nice white finish.

Sand between coats.

Paint, I'd use Pro Classic water alkyd.

https://www.sherwin-williams.com/homeowners/products/proclassic-interior-waterbased-acrylicalkyd

Tom

Offline mkurtis

  • Posts: 6
Re: Interior Door - Water-based products over existing oil-based
« Reply #2 on: November 06, 2018, 01:02 PM »
Thanks for the great reply Tom.

Krud Kutter has two products, one called Gloss-Off Prepaint Surface Preparation another that is Pre-Paint Cleaner/TSP Substitute. Are either of those good choices?

Online tjbnwi

  • Posts: 5730
  • Cedar Tucky Indiana
Re: Interior Door - Water-based products over existing oil-based
« Reply #3 on: November 07, 2018, 07:34 PM »
Plain old everyday Krud Kutter cleaner. The goal is to remove any dirt/oils from the surface prior to sanding. I do not use any of their paint prep products.

Tom

Online Pnw painter

  • Posts: 166
Re: Interior Door - Water-based products over existing oil-based
« Reply #4 on: November 08, 2018, 10:13 AM »
If the trim has deep brush marks I’ll sand with Vlies. It looks like a scotchbrite pad and does and excellent job of abrading all the nooks and crannies and typical sandpaper misses on surfaces with deep brush marks.


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