Should I bleach unfinished SPF lumber to remove stains?(solved)

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Forum topic by artislee posted 07-11-2017 08:59 AM 1367 views 0 times favorited 3 replies Add to Favorites Watch
View artislee's profile


28 posts in 1181 days

07-11-2017 08:59 AM

Topic tags/keywords: bleaching finishing untreated question

Hello, I have a project that I used SPF lumber from home depot on and I am fairly satisfied with the wood for what it is except I have noticed a few places where there are dark streaks blended in with the grain. I am assuming it is mold or mildew stains(please tell me if I am wrong) but I don’t want this to mess with the stain when I apply it both the way it looks and absorbs into the wood. I have read several things about bleaching wood to remove the stain that was applied but I couldn’t find anything that dealt with my situation, so any advice anyone has on if I should or shouldn’t and how to go about it if I should bleach the wood will be greatly appreciated.

It is a table top that I will be using a water based stain(haven’t decided which yet) but I am thinking of using Famowood’s Glaze coat clear epoxy as my finish.

-- "Woodworking is cheaper than therapy!"

3 replies so far

View bobkberg's profile


439 posts in 3876 days

#1 posted 08-11-2017 04:47 AM

Hi Artislee,

I didn’t recognize the term SPF and looked it up to find it stands for “Spruce Pine Fir” which covers several species of wood and different behaviors (of the wood, not the craftsman). My first question back to you would be to ask how “fancy” this tabletop is intended – formal dining room, picnic, or somewhere in-between?

Since all of them are soft woods, I have no opinion on the stain itself, but I’m wary of using an epoxy finish on a soft wood for fear that any indentation would break the finish since it wouldn’t have strong backing. I like epoxy finishes, but have found them somewhat brittle and better suited to materials which can support them.

What is the intended purpose of the table? That may shed some light on the problem.



-- Bob - A sideline, not how I earn a living

View Loren's profile


10477 posts in 4451 days

#2 posted 08-11-2017 04:53 AM

Stain will cover a lot of minor color variations
in lumber. I doubt anyone but you would
notice stains in the pine underneath.

It may be cheaper to rip out and replace the
stained sections than buy the bleaching
chemicals and safety gear.

View artislee's profile


28 posts in 1181 days

#3 posted 08-11-2017 08:50 AM

Thanks for the replies
Bob it was for a fire pit table that I was making and thus far I havent had any problems with the epoxy on the soft wood but it has only been two weekends(table is at a cabin by a large lake near me,used for partying and what not) so the epoxy being brittle is one of many problems I forsee. LOL

Loren thanks for the advice, I had only read about bleaching a little bit and didnt realize the materials and safety gear were a bit pricey. So thanks again.

-- "Woodworking is cheaper than therapy!"

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