Need yellow floor white

[Hargus]

Hi Everyone,
                I'm getting ready for a trip this weekend. I had taken all of my equipment out of my new to me 1991 Starcraft Starmaster. I noticed when I had the pup empty that my floor has a yellow to it. I have cleaned the floor before, but I was wondering if anybody had a tip to take the yellow out. I used a little soft scrub with not much luck. I was thinking about maybe using some bleach or something but I didn't want to put alot of chemicals on it without being sure.

Thanks

[tlhdoc]

Were there throw rugs with rubber backing on the floor?  If so I don't think the yellow will come out.

[Hargus]

Were there throw rugs with rubber backing on the floor?  If so I don't think the yellow will come out.

 I'm not sure what the previous owner had done but I don't think it was from rugs since it's on the entire floor. I think it might be the age (it's a 1991). I can live with it if I have to, but I'm just trying to clean it up as best I can. There must be an old fashioned trick or proper chemical out there.
 tlhdoc,
          Seeing that your from Pennsylvania (I know it's big.) what do you know about Sesame Park. Could it be worth it or is it just a typical money park? Is it in a good area? Have you or any from your group camped around there? I got some information on Colonial Woods are there others a somewhat short distance away? Thanks.