Stain Removal?

[Rideitout]

Trying to remove this stain of unknown origin from a previous owner. I was hoping not to have to buy another cleaner/solvent so I tried what I had on hand:

Clorox
Full strength bleach
La’s Totally Awesome
Rubbing compound
Acetone
Paint thinner
Mineral spirits
Starting fluid
Carb cleaner
Gasoline
CLR
Goo Gone
Muriatic acid
Bar Keepers Friend Soft Cleanser
Davis FSR
Star Brite Bottom Cleaner
Star Brite instant cleaner gel
Comet
Cussing at it
Drinking beer then cussing at it

Rubbing compound with a drill brush attachment got most of it up but it required a lot of time. The before and after pics are from compounding it for about 4 hours.

Still taking suggestions on how to get the remainder removed.

Thank you!

 

[Marvin willis]

Muratic acid Instantly gone

 

[Rideitout]

I do have some in the shed. I was leaving that for the last option thinking it would be harsh on the gel coat. I may give it a shot.

 

[Marvin willis]

I use it. It works so well

 

[Rideitout]

Well that didn’t work either. I applied full strength muriatic acid and let it sit for a few minutes. Didn’t do anything. “After” pic attached.

 

[Marvin willis]

And u wiped it with a rag? If that doesn’t do it I have no clue.

 

[Farny]

Ask your local crime lab forensics unit for advice - see how they clean up a murder scene.

 

[Rideitout]

And u wiped it with a rag? If that doesn’t do it I have no clue.

I did. Maybe I’ll soak some rags with muriatic acid and let them sit on the stain for a while.

Ask your local crime lab forensics unit for advice - see how they clean up a murder scene.

I might give that a shot. I still have Bar Keepers Friend, Starbrite bottom cleaner and Davis FSR to try.

 

[Farny]

Hope it’s not the gelcoat itself that’s turned

 

[Tjw961]

I had some luck on bathroom sink counter with Bar Keepers Friend. I used liquid version, let it sit till it dried then removed cake/powder leftover. Took a few times to draw out the stain. Not sure on gel coat, but if you have it on hand I would. I don't think I would rub it on gelcoat though. Too gritty if I remember right.

 

[Tjw961]

Found this video.

 

[Marvin willis]

I’m a big fan of bat keepers friend but normally acid is my go to chemical if bar keepers friend doesn’t work.

 

[Rideitout]

Tried these today and none of them touched it.

Bar Keepers Friend Soft Cleanser
Davis FSR
Star Brite Bottom Cleaner

 

[VitaminSea]

Wow! If you put down sea deck / marine mat will it cover the area?

 

[Noko]

Ask your local crime lab forensics unit for advice - see how they clean up a murder scene.

They hire...." A Cleaner".... I think Samuel L Jackson

 

[Farny]

Last resort might be to use some medium cut polish and see if that stain is imbedded in the gelcoat. Not looking good…

 

[Noko]

You could always spay it white. Maybe not a great match but better than the stain.

 

[Rideitout]

Some good advice, I’ll keep trying. The SeaDek wouldn’t cover it all.

 

[Rideitout]

Making progress after a few hours of rubbing compound coupled with drill brush attachments.
Before and during pics.

 

[Farny]

Wow what a pain, looking more like the gelcoat itself has turned