Cool pics, dr1979-340.
Snojetsst440, it's tough to tell what you're dealing with, without pictures.
You might try some automotive polishing compound....different from " rubbing compound" ,which migh be a bit too aggressive to preserve the finish.
Not knowing how much time and money you want to devote to this...exposed fiberglass....lichen growing...doesn't sound too promising.
Perhaps the best option is looking at re-finishing the hood.
vintagesledpaint.com sells bulk paint (quarts) or spray cans of SnoJet blue....18.95 a can, plus shipping. Not cheap, but high quality stuff. Your hood may have faded over the years....so, the new paint may not match precisely, but it is a dead ringer for the original color.
Your best option might be to remove the lichen, fill in the bad spots with some "Bondo" auto filler, wet sand the entire hood, use a good primer, and re- paint the whole thing.
You could use about any decent quality gloss white paint for those areas.
I'm betting replacement decals are available.