Designing Kitchens and Bathrooms - repairing a porcelain bathtub

I have 2 rust holes around my overflow drain locatedj ust under the faucet in my porcelain tub. I was told to seal it or fill it with automotive "bondo," then apply epoxy from a fix kit to the surface(colored white). Do you have any other ideas on how to repair this? The repair shop wh=ants $135 just to fix this.

I'd appreciate any help.

thanks,
usb 2004

You can try Appliance Touch-Up liquid available at appliance and hardware stores. Just call around. It comes in bright white for repairing chipped white appliance enamel, and drys hard as a rock.
Sand or emory cloth the rust off as much as you can.
Clean and dry (hair dryer) the spots.
The touch-up comes with a cap brush like nail polish. Brush is on, and smooth up the edges with a Q-tip and acetone (nail polish remover), and allow to dry overnight.
It shrinks a bit, so you may have to do more than one application.
It maight not last as long, depending upon the rust, but it will be way less expensive than $135.
Good luck!
Mike

thanks for the reply,

Unfortunately, the rust holes are much bigger than the patch up kit can cover. About 3/4" x 2". Would you reccomned a cold weld epoxy or bondo, then use the appliance paint to color ? Also will this paint stick to bondo or epoxy?

thanks again
usb2004

As a follow up to my earlier posts, I filled in the holes with automotive bondo and sealed it with the chip fix kit (epoxy resin)
Everything looked good until I started using the shower and water got on the patch area. I notcied that some of the epoxy filler had gotten soft and gooey. Does anybody know why this is?

I saw this new product that is a epoxy putty that comes in a stick form. You just pinch off what you need and mold it to your job and let it dry. Is this good for my job?

any input would be appreciated
usb2004