In my Del Sol, 1993, the rubber surrounding the window had become cracked. I used some silicone oil and now it looks better, however it is still pitted and I worry about it not being able to keep the rain out. I live in California so right now it's not really a problem, but I would like to get it fixed before winter. Should I change it out, if so where would be the best to get it, or is there a better way to rejuvenate it?

 

You can't fix cracked and broken rubber. I would either look at junkyards & online for used pieces, or get new ones from Honda.