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Posted by Norminn on July 4, 2007, 7:08 am
RicodJour wrote:
>
>>It was recommended I sand poly interior trim before painting white. If it's
>>not flat (i.e. it's typical nook-and-cranny cross section, like most trim
>>nowadays), how do you go about sanding it?
>
>
> You should clean the trim to be painted before sanding to make sure
> there's no grease or oils that will cause problems with the finish.
> Wrap sandpaper around a suitably sized dowel or pencil to sand the
> rounded parts, and fold the paper to sand into the sharp corners.
> Other than that it's business as usual. You're just scuffing up the
> surface to give the paint primer something to bite onto. Use a primer
> with high adherence like Benjamin Moore's Fresh start.
>
> You could use a liquid deglosser (aka liquid sandpaper) that is a
> really nasty chemical cocktail that will soften the poly and give it
> some tooth for the primer. It will also take care of the cleaning
> step at the same time. It's nasty stuff so wear a respirator.
> http://www.cornerhardware.com/index.php?main_page=index&cPath=7632
>
> R
>
Good advice. I've repainted after bad paint jobs done by other people
and find that issue #1 is absolute cleanliness. Gloss is less of a
problem than greasy dirt and fingerprints. Clean it well with your
favorite household cleaner, wipe with denatured alcohol. I use only
alkyd semi for trim, but it has issues with yellowing nowadays. Latex
is crap for trim, especially when time to repaint. It may not yellow as
quickly as alkyd but stains more easily.
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