Just strip and brighten for prep. Use the RAD Stripper with both additives: Brightener after.

The prep you help will not work to remove a gloss coating. You will have to sand it all off first and then you can use the prep after. Do not sand aga...

@administrator Ok so in terms of addressing the issue do you think it can by be solved with just sanding and applying a stain with a fungicide? I pu...

If it is mildew than bleach will kill it and remove it. if that does not work then it is not mildew.

@administrator Thanks. I've been hesitant to stain it since I didn't want to stain on top of mildew. If it is discoloration, then I guess I cou...

That is internal discoloration of your wood type. Cleaners will not remove it. Brighteners may help but hard to say for certain. I doubt sanding will ...

Yes, you can do this.

It could be due to the gloss sealer. They gave you bad advice.

Thank you...the gloss sealer was recommended by the company we purchased the lumber from. Do you think the mildew is attributable to the sealer? If ...

You cannot use a gloss sealer on a wood deck. It will peel, blister, and attract mildew. You will need to remove it fully. Most likely by sanding. Onc...

Post pictures.