Yes, I've tried various coatings (grease, etc) on the springs and aside from the nasty looks and hard questions I get from Marine Patrol when they see that rainbow develop the minute the trailer touches the water, I only get so-so results.

So I guess the torsion axle may be the most prudent way to go...

Next is to get the dang disc calipers to keep from sticking. No corrosion that I see on piston... must be the actuator (hydraulic surge brake) not returning all the way? How do the calipers adjust for pad wear?