A neighbor here gave me these clamps - three of the top ones in the photo (60"), two each of the others (36" and 32" respectively).
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They are rusty (they've sat on a shelf since 1971 when her grandfather died. He built the house here in Los Angeles with these clamps - doors, windows, and a lot of very nice furniture in that house) - so how should I clean them up? - phosphoric acid or just steel wool and WD40?
I'm not familiar with the design of the middle clamp in the photo - can anyone tell me what it is and what it is used for? Is it obsolete or still a good one to have around?
thanks