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Oil Based Primer questions

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Forum topic by kyngfish posted 07-09-2018 02:10 PM 394 views 0 times favorited 4 replies Add to Favorites Watch
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kyngfish

35 posts in 483 days


07-09-2018 02:10 PM

Hi – so I’ve been searching the web on this and looking for a few answers but haven’t found anything concrete.

I few weeks ago I used latex primer and latex paint from sherwin williams to paint some chairs, only to realize that latex really isn’t up to the beating that chairs can take. No biggie, they look great right now, and in a year I’ll repaint them with oil.

Moving on to another set of chairs, I decided to go the oil paint route, and bought oil based primer and paint. I laid on a coat of primer and let it dry for an entire 24 hours (I live in south florida, and it’s humid).

Anyway, after 24 hours I went to sand to add another coat, because the chair is old and has some grain showing, using some 220 grit sandpaper on a makita random orbital sander at setting 3 – (of 5). Anyway, it didn’t go well, it seemed like the primer wasn’t ready to be sanded and it gunked up and now the finish is uneven.

So, how long do I need to let oil primer dry before sanding? Waiting weeks for it to cure seems excessive.

OR should I use the faster drying and easier to sand water based primer and apply oil paint as the final finish?

Any other tips or tricks appreciated.


4 replies so far

View enazle's profile

enazle

66 posts in 401 days


#1 posted 07-09-2018 02:26 PM

Depending on the paint, you can spray a light coat of Naphtha over the paint and it will cause it to dry faster. Not sure why but I think once the paint flashes off, some of the spirits and thinners are trapped underneath. The naphtha opens up the top layer to allow them to escape quicker.

I’t takes 4 days for some oil based paints to fully cure, myself I would give them a week before using the chairs.

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kyngfish

35 posts in 483 days


#2 posted 07-09-2018 02:29 PM

Thanks for the feedback I’ll try the naptha. I won’t have a problem with the chairs once painted, my problem is how long to wait to sand the primer down to a smooth finish before putting another layer of primer on.

I don’t mind waiting a few days, but waiting the full 4-5 weeks for it to cure seems counterproductive.

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CaptainKlutz

1379 posts in 1888 days


#3 posted 07-09-2018 02:49 PM

Suggest you try Zinsser Cover Stain primer. It is oil based exterior grade wood sealer that dries quickly and sands easy. Maybe not as fast/easy as BIN Shellac based primers, but much quicker than regular oil based primer. I have applied cover stain in morning, and sanded smooth in afternoon on warm dry day in AZ.

-- I'm an engineer not a woodworker, but I can randomly find useful tools and furniture inside a pile of lumber!

View bilyo's profile

bilyo

696 posts in 1496 days


#4 posted 07-10-2018 03:37 AM


Depending on the paint, you can spray a light coat of Naphtha over the paint and it will cause it to dry faster. Not sure why but I think once the paint flashes off, some of the spirits and thinners are trapped underneath. The naphtha opens up the top layer to allow them to escape quicker.

I t takes 4 days for some oil based paints to fully cure, myself I would give them a week before using the chairs.

- enazle

His job is done now, but for future reference, would the addition of some japan dryer help in this situation?

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