Yupper Lots of info on black streaks here.

I purchased the StreakMaster products last year and if handled correctly they are very effective.

Just a few days ago while I was walking thru Wallys I picked up a spray bottle of concentrated Purple Power.  I just spot checked it today, seemed to work like a charm.

My thing that I learned is that a soft rag is more effective than an RV brush.  Its all Elbow grease I figure.

Just to resurrect this post a little.

I armed my wife with the hose and I with a soft brush on a stick with a spray bottle of concentrated Purple Power spray.

As she wet the trailer I sprayed the PP and then waited a few seconds then scrubbed.  We moved around the entire trailer using the cleaner on every surface. Rinsing as we went.

Polished walls, painted areas and the non polished surfaces.

Wow! Was this easy or what!  The trailers first bath since last fall and it is gleaming.

I will be honest there are a few area's on the non polished aluminum that colored strangely.  Not bad and not many but a few.  I applied some of my streak master aluminum clean to these areas and viola beautiful!

What I can not get over is the shine the polished aluminum walls picked up.

I think I have just added a new weapon to my black streak arsenal!

Yes I would say yes. 

Today I had a chance to walk around and look closer at the trailer after it sat thru a rain storm and dried in the sun.

I still think the polished aluminum sides are at their shiniest they have been and I have been working thru a variety of polishes in the recent seasons.

I however believe I now need to get a wax or protectant on the trailer as soon as possible.  If you read the PP it is a caustic agent and has removed any waxes or polishes applied.

I will offer a further update on the discolored areas as I am going to recheck a few of up higher ones this weekend. 

Again they are not terrible.  I am a detail freak and sometime a single scratch bugs me just a tad too much.

I am not backpedaling yet, as it was still by far the easiest cleaning I have ever done. 

I would not use this cleaner everytime.  Maybe spring only.  I still like the streak master product for every day washing. 

I may use the streak master wash this weekend to add a protective coating to the trailer instead of hand waxing.