Can GF Exterior 450 be applied over a coat of oil?

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Forum topic by mcg1990 posted 07-23-2015 08:48 PM 834 views 0 times favorited 2 replies Add to Favorites Watch
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159 posts in 1491 days

07-23-2015 08:48 PM

I’m looking to finish an exterior piece of furniture made of Western Red Cedar. I know I know, me and a million other posters, but I have done a forum search and can’t find an answer to my specific query, so please forgive and/or indulge me.

I’m looking to deepen and significantly extend it’s natural tone. My instinct tells me a pure oil should solve the ‘deepening’ aspect, and Exterior 450 – with its UV blockers and non-film forming finish – should handle the longevity issue. It should also seal off the pores to create a surface that dries faster after rain, and is easier to wipe off mud etc. Am I correct so far?

Of course, greying is inevitable in the long run. Will an application of GF450 close off any avenues of rejuvenation (aside from a deep sanding) in the future? I’m aware that, with oil, a light sanding and additional coat can maintain a somewhat like-new appearance.

Can I expect any conflicts between the finishes? If my thinking has been sound so far, how long must I wait between the oil application, and GF450?


2 replies so far

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1872 posts in 1997 days

#1 posted 07-24-2015 02:14 AM

Gf 450 is a film finish,It’s a nice product very easy to apply I used a foam brush, it levels out very good.Its kinda like paint with a longer open time but zero pigment only the uv blocker.I don’t know if it’s goona brighten you cedar since it has a plastic look.I suspect it mostly acrylic.Hope this helps.

-- Aj

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Fred Hargis

5173 posts in 2692 days

#2 posted 07-24-2015 12:12 PM

You didn’t mention which “pure oil” you were planning on using, but I’ve used waterborne acrylics like GF 450 over BLO with no problems. The trick is letting the BLO (or whatever you use) cure sufficiently before applying the top coat. In my case i waited a week, then applied the top coat.

-- Our village hasn't lost it's idiot, he was elected to congress.

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