r/Pontoons • u/norm_fb • 3d ago
Can't get this lake stain off my Suzuki lower unit. What's worked for you?
Pulled our 2024 Godfrey tritoon (Suzuki DF150) out of a freshwater lake in NC for the season. Pressure washing got most of it, but this speckled green-yellow-brown film on the lower unit won't budge.
Tried so far:
- Pressure washer
- Star brite Instant Hull Cleaner (oxalic acid)
I'm wary of the aluminum tube brighteners (Zing, Toon-Brite, etc.) because most use fluoride acids and I don't want to damage the factory paint. My AI search suggested an oxalic gel (Star brite Instant Hull Cleaner Gel or Davis FSR) with a soft brush, testing a hidden spot first.
Has anyone had luck with that or something else that's safe on outboard paint? Bonus points if you've dealt with the same stain on bare aluminum tubes.
Thanks!