They make this cleaner called awesome its at the 99cent stores. Just don't use full cleaner mix it with a little water. I use it on my boat and jet skis every time I get out of the water. Works really good.

Ducky.

Then the best thing to try is a little pool acid mixed with water. Try it on a spot where no one can see it. Pool acid take any hard water off. U half to do it quick.

Ducky might do the trick hit up uncle bobby he knows the owner and all the products he Carry's


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I think you guys missed some details here.

These are on the headers....that means they are baked into the ceramic

I tried CLR (shit removes hard water spots like cake from my shower door).....and it didnt put a dent in them.

I am familiar with Ducky - grew up using the shit, it was awesome for whipping down the gel when you come off the water....but I am sure CLR is a bit more potent than ducky.

Tried the magic eraser suggestion - didnt work either.

these headers were spotless when i picked up this boat and had been on the water several times - maybe ill just contact the PO to see what he used.

If solvents fail, try a good rubbing compound

Muriatic pool acid.

Use at about 4:1 with water. Wear your Playtex gloves, pour it onto a cloth that you don't care about.

Fire up the boat (or heat with a trigger torch) and wipe the shit off... If it does not work the first time, fatten it up and go 1:1 ratio, just don't breath the shit. Acid into water when mixing, not water into acid. Use cardboard over the concrete if that is where you are working, it will eat the cement.

We have used this on headers for years. I think it is the only thing that will work. It needs to be warm/hot so it can break the glaze over, it turns into friggen glass... (calcium carbonate and silica...

Otherwise find someone with some Rydlyme, it is an electrolytic compound designed for such stuff, but way safer. There are numerous different blends of Rydlyme. http://www.rydlymemarine.com/

The pool acid will be stupid cheap.

Don't get any on your clothes or skin, burns like a MOFO


EDIT; Oh yeah, wash it all down with soap and plenty of water when your done and stay away from ALL aluminum... This acid is about 600 times the strength of CLR.

Go to your favorite restaurant and see if they have descaler for their dishwasher. Its pro grade and works great. not as harsh as muratic acid but should remove the spots.

Hey Brad just wondering if you ever got them off and what you used?

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