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Question DetailsAsked on 11/22/2015

The window trim is cement fiber board. The existing paint is peeling in some places, how to paint.

My home is 17 years old. This will be the first time to paint since built. The paint has peeled mostly on the window bottom trim pieces which are cement fiber board. How do you prepare these sections, so when it is painted, it would look seamless, not be able to tell where the paint had previously peeled..

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Peel, scrape, rough sand, finish sand, clean, prime, paint.

First scrape under the loose peeling paint with a putty knfe or such, then use a blade scraper like this -

http://www.amazon.com/Warner-Tools-73...

to scrape off all you can get off without excessive force, then coarse sand to roughen all the surface and feather the remaining paint edge using probably #40 grit sandpaper, then sand smooth and to finish feather the remaining paint (which might be none if in bad shape) with #80-100 or so sandpaper till there is no detectable bump or edge when you run your finger from bare cement board to paint. Then dust thoroughly, and wipe clean with wet rag several passes to remove the dust or the finishes will not stick right. Let dry thoroughly, then prime with a primer designed for concrete or cement board siding - or use a concrete floor paint stating it is usable for outdoor use also as the finish paint. Then after thoroughly dried (if using primer), finish coat with 2 coats of compatible exterior finish paint, preferably from same manufacturer - generally an exterior trim enamel will last longer than a normal latex or acrylic latex house paint.

Answered 3 years ago by LCD




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