Black streaks on fence how do I remove them?

[Carolina Clean 14]

Sprayed the fence down with 12.5% bleach today using the downstream injector. Had to go over the thing three times with bad results. First buckets where 3 gallons of bleach 2 water, simple cherry, gutter grenade. Finally got tired of having to keep going over. So I put straight bleach in a plump sprayer. Sprayed the fence off then rinsed. With better results. Not 100% happy with it. What do you think it is? What do you suggest?

Here's the pictures.

Work pictures by carolinaclean - Photobucket

[TNRoofCleaner 16]

Looks like thin spots in the paint to me. It is probably time for a fresh coat.

[Carolina Clean 14]

You know that's what I thought. I was pretty consistent all were in almost the sames areas of the fence. Close to the corner. I think it was painted a year or two ago?

[Dieseldad97 14]

Did you try brushing the worst spots to see what it looked like?

[Doug Rucker 31]

Yeah, looks like it's just the paint wearing down. Looks like it's starting to show bare wood, but hard to tell for sure in the pic's. I agree, repaint.

[Beth n Rod 1,279]

It is in the paint. Even with a re-coat, they need to know it will very possibly return. If you do re-coat the fence, use a primer like Problem Solver as a coat before you apply more paint, and also add a mildewcide additive to the paint you apply.

Beth

p.s. if you didn't brush the fence when you washed it, try that too. Brushing can make a huge difference....Also what temperature was your water???

[Carolina Clean 14]

Not sure on the temp of the water. It was well water that was filtered by multiple filters. Will try a brush next. Is there a certain brush you guys recommend? Going to Lowes to look for one today. Supposedly the paint was some really expensive stuff that combats mildew?

[dave mac 26]

most decent exterior paint comes with a midewcide in them already, you just cant fight mother nature, it may help a little but make no promise

[Beth n Rod 1,279]

Is your pressure washer capable of producing hot water on demand, or did you wash with cold water was my question. Hot water cleans better.

Beth

[Carolina Clean 14]

Just a cold water 8gm unit.