Sadly think you had the right idea with the shovel. I have seen people use cheap roto tillers, but that was on a large ship and had literal rooms filled with foam.Just looked up the MSDS on Zep a lume...pretty nasty stuff..like complete bunny suit nasty...Next idea...
Got the majority of the foam out...NINE 55gal trash bags..phew! Now hands and knees for the other bits...then pressure washer..will pressure washer get the remainder? Or is it wire wheel and scraping?
That pour in foam is the bane of AL boats, not sure why anyone would want to use it. Yeah it does look like a large amount of crud and corrosion is under the foam from the pics.Can't hurt to try with power washer, but would still want to wire wheel back behind the foam. Want to make sure all the corrosion is out and no pitting is hidden under anything.
Maybe not the best in this case, vinegar works great for minor pitting and total AL cleaning to neutralize normal corrosion. You may need to go to something a little stronger in the acid dept. Since I've not used any acid I'll defer to others who have like @classiccat.Lots of pitting...some holes. After the wire wheel and the vinegar wash...best way to care of the pitting craters?
Any pictures of the craters? I used Vinegar and Ketchup for minor ones too. I did try some rustoleum rust stop, but don't think it did any better then the vinegar/ketchup.Lots of pitting...some holes. After the wire wheel and the vinegar wash...best way to care of the pitting craters?
Or am I overthinking this...repair holes and coat the aluminum "acne" with epoxy paint?
I used mechanical (Nyalox cup brush & a dremel to dig) means to remove the visible alumina (Al2O3).
As we move forward, Im headed out Wed Am for the pressure washer endeavor...as we clean the inside of the hull and we select products, are we looking to just seal the boat or are we looking to also add strength to those areas eaten by corrosion. I understand patching and sealing any penetrations.
What about the "cratering"? Are we trying to fill that?
Seems like Marine Tex/ JB Weld paste is going to take a bunch of "plastering" to cover large areas of the hull.
Is there a product in the "paint" category that would go further to cover a 7 ft x 16 ft area? Thanks to the Starmada brain trust, you folks are amazing!! Cheers Mike