Garage door "dirt" not coming off

Residential
1

I am still learning here but have researched a lot. I had a job yesterday where the top section of an aluminum garage door would not come clean. I have seen this a lot where the upper sections of siding and garage doors, typically these sections are covered by an overhang, have a caked on dirt that is really stubborn to remove. I did make decent progress but it still looked dirty when I was done.

In this home yesterday the garage was facing north-west and I was there in the early evening so the garage door was hot from the sun.

My attempts were:

  1. rinse the aluminum garage door to cool it down
  2. tried SH - .75% - since it’s not organic growth this did nothing
  3. Tried LA Awesome - diluted then straight - showed promise but I needed to scrub a lot and I was getting close to bare aluminum.
  4. Tried diluted Gutter Grenade - same results as LA Awesome

I have not tired Purple Power but wonder what the difference in PP and LA Awesome is.

How do you guys deal with this? Thanks!

This in not the house I did but a good example.

garage

2

Thanks for labeling the roof. I was a bit confused at first, I thought it was a deck lol

7 Likes
3

Man we have a ton of that here in Louisville, atmospheric crud (fallout) just collects under eaves and doors. I’m not much help though as all I use is some type of degreaser which you already tried.

4

Aluminum brightner - will make it look new Pump spray a lite coat on it, let dwell few min and rinse with medium pressure fan spray. I use my m5ds so about 500 psi

2 Likes
5

Thanks Rick! I will give it a try. Does it matter if you pump spray on the dry garage door or should the door be misted first? Thanks again!

6

Either will work. If it’s wet need to put more on it though and a little longer dwell.

7

Which brand aluminum brightener do you recommend?

1 Like
8

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This stuff cleans the black residue or tiger striping on gutters. I’d imagine it work on this same application.

1 Like