Rudder questions

I bought a used H16 set of rudders/castings/crosbar/tiller to have as a spare. They have new cams installed and also shims.

The rudders hava a yellowish color and have either "CATCO" or "CALFCO" engraved in them. It is hard to make it out.

Are these stock or aftermarket?

What material are they made from?

What is a good way to clean them up?

_________________
1980 18 foot class A Unicorn catamaran
1977 Super Sunfish (sold)
1979 Hobie (sold)
1983 Hobie 16 Hawiian Sunset (sold)
1981 Hobie 16 Tequilla Sunrise (sold)
2008 Hobie 16 (sold)
2023 Hobie 16
Founding member of the "San Dimas Yacht Club"
John

As far as I know Hobie Cat never molded any such letters/name in their rudders. If you cannot see any fiberglass material on the blades it's a good chance they're made of lexan which would explain the yellowing color. Is there any chance you can shoot some photos of them (full view & some macros) & post them here??

I tried Ajax, Comet and Softscrub with bleach but there is really no way to get the yellow out. I lightly sanded mine (150 grit) and sprayed with Krylon Fusion. Its made for plastic and seems to be holding up.

Acetone works really well for taking the yellow and other types of stains off of rudders.

_________________
Tim
84 H16
82 H16
87 H14T
Tortola Sails: 115222
Blue Prism Sails: 88863
Clearwater, FL

If they are made of lexan don't put acetone on them! Be sure you know what you're dealing with before using such harsh chemicals