Homemade Hull Cleaner


The works toilet bowl cleaner - $3 a bottle at Walmart. Same acid. Same results. No mixing. Definitely wear gloves, avoid aluminum parts and rinse immediately.


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According to the MSDS, the toilet bowel cleaner uses Hydrochloric Acid, not oxallic acid.

https://media.lifeandhome.com/media/downloads/1250/40028354_MSDS.pdf

Not saying you can't use it, or that it's not effective, it's just not the same acid.

The StarBrite hull cleaner uses Oxalic, which I've had good luck with previously, I just make it myself now.

https://maximpulse.com/tools/download/star_brite_msds_409772.pdf

I'm not sure which acid is better/easier/more cost effective, we'd have to do some testing. Might be something that Project Farm guy could do! (if he boats)

https://www.youtube.com/c/ProjectFarm

I've used this homemade stuff now for at least 4 years. So far so good.
I just need another 10 years out of the boat. (Hope to buy a live-a-board 2032-2035).

I do wax every spring before I put the boat in, but with 80 engine hours (translates to over 400 hours in the water), I'm not sure I can really avoid these stains.

If anyone has something (not bottom paint) that prevents the tan stains, I'm all ears!
 
You are right I shouldn?t have said same acid. The oxalic acid is probably ?safer? for use in marine but the HCl is stronger at equal concentration. Mixing yourself let?s you control the strength. It?s not something I like to use very often but some bodies of water tea stain the hull so bad it literally melts the stains in 30 seconds no rubbing.
One thing I learned is to apply it in small areas lightly daubing it on with a damp sponge (rubber gloves!) The goal is to not get it anywhere but on the hull. Wait 30 seconds and rinse profusely, move to next area.


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