Bicycle Mechanics - Suggestions for Removing Rivet holding mud-flap

My LBS used a 3/8" rivet to attach a milk-jug flap to the end of my plastic fenders. They didn't work 'cause he put -em on backwards. Awk! Causes the mud to fly up!

I made a nice concave black flap from the edge of black 1Qt Halvaline 2-cycle oil jug. Would like to attach it to the same hole as the previous with just a nut/washer.

Will the concave work better than a flat mudflap? Any shape and length suggestions would be welcome.
How do I get the rivet out of the plastic fender without breaking the plastic?

My LBS used a 3/8" rivet to attach a milk-jug flap to the end of my plastic fenders. They didn't work 'cause he put -em on backwards. Awk! Causes the mud to fly up!

I made a nice convex black flap from the edge of black 1Qt Halvaline 2-cycle oil jug. Would like to attach it to the same hole as the previous with just a nut/washer.

Will the concave work better than a flat mudflap? Any shape and length suggestions would be welcome.
How do I get the rivet out of the plastic fender without breaking the plastic?

I'd just drill out the rivet.

Rivet is most likely a "pop" rivet and should be easy to grind out if you have access
to a grinder or easier to drill out as retro suggested. Pop rivet sets are cheap and
make very good attachments. Use a nylock or nylon insert nut if you use nut &
bolt to attach. Concave will hold form better. I did the same thing on my bent
but used the side of a plastic nursery pot. (VR- same as on About.com ? I got
booted off about when they separated from delphi last yr, about says I am already
registered and won't let me get on.... ) Steve

I'd just drill out the rivet.

Sorry I'm a chick and need more details than that. err ...do you mean....

A. Drill a small hole through the middle of rivet for the new fastener?
B. Drill a hole larger than the whole rivet? -- err what sort of drill bit does this?

Rivet is most likely a "pop" rivet and should be easy to grind out if you have access
to a grinder or easier to drill out as retro suggested. Pop rivet sets are cheap and
make very good attachments. Use a nylock or nylon insert nut if you use nut &
bolt to attach. Concave will hold form better. I did the same thing on my bent
but used the side of a plastic nursery pot. (VR- same as on About.com ? I got
booted off about when they separated from delphi last yr, about says I am already
registered and won't let me get on.... ) Steve

Yes that's me. Nice talking to you Steve. We miss you.

Sorry I'm a chick and need more details than that. err ...do you mean....

A. Drill a small hole through the middle of rivet for the new fastener?
B. Drill a hole larger than the whole rivet? -- err what sort of drill bit does this?

Pick a drill bit about the same size or larger than the back side of the rivet (The side that is mushroomed out. Drill through the front side of the rivet and the rivit will fall apart. The front side is the large flat part with a small hole in the center.

You can use any ordinary electric hand drill. Although it would be easiest to remove the fenders from the bike, you can probably get by by removing the wheel and using a piece of wood behind the fender to stabilize it. Watch your fingers and guard against the bit slipping.

Pick a drill bit about the same size or larger than the back side of the rivet (The side that is mushroomed out. Drill through the front side of the rivet and the rivit will fall apart. The front side is the large flat part with a small hole in the center.

You can use any ordinary electric hand drill. Although it would be easiest to remove the fenders from the bike, you can probably get by by removing the wheel and using a piece of wood behind the fender to stabilize it. Watch your fingers and guard against the bit slipping.

Ultra cool. Your description of what is front and back helps alot. This is a huge help thanks.