I live in SoCal (Santa Barbara) and have a redwood deck that I built about 20 years ago. Full sun. Slight mildew issues. Previous stain/sealers in...

Over-applied and/or improper prep. You would have to remove to bare wood to fix it.

OK thank you! Looking forward to getting my deck back. I'll send pics after it's done. I appreciate this site and the advice. Jeff

Use the RAD Stripper with both additives. If it does not all strip off, sand as needed. Brightener last. TWP 1500 Series or Armstrong Clark when done.

You would have to sand it off to fix this.

Hi, my name is Lana and I really need an advice. 1. Ontario, Canada 2. Full sun 3. Decking tiles from Ikea (Solid acacia wood, Acrylic s...

Wood brightener doe snot harm wood filler. FYI, your semi-solid stain will not blend to stain with your wood filler. The wood filler will show through...

@administrator I've had to repair some rot in this porch using a 2-part wood filler. Will this deck brightener affect those repairs in any way? I don'...

It looks like mold.

A wood brightener will help the stain to soak in better after sanding. It does not harm vinyl.

Do I need to use a wood brightener? The horizontal deck boards have been sanded smooth, and the vertical spindles have also been sanded. Do I need to ...

Not all semi-transparent stains can be sprayed, especially the ones that are more like paint or solid stain. Doing it in sections will most likely res...