Slowly decaying vehicles

Question

It cannot quite talk back
(Well, almost cannot),
Nor used to measure value.
It's sticky but not brown.

Clad in warning colours,
But ever so good to eat.
Often found in winter
To make a colder nose.

What does this short riddle describe?

Answer 1

Is it...

A carrot? (the "car-rot" the title is referring to, thanks @gnovice)

It cannot quite talk back

Not quite a parrot

(Well, almost cannot)

Carrot is written almost like "cannot"

Nor used to measure value.

Not quite a carat

It's sticky but not brown.

Looks like a stick, but orange (thanks @Chris and @gnovice)

Clad in warning colours,

Carrots are orange

But ever so good to eat.

I do agree

Often found in winter To make a colder nose.

Often used for a snowman's nose

Answer 2

Is it...

Honey?

It cannot quite talk back

Honey cannot talk back

Well, almost cannot

The bee that it is made from might be able to talk back.

Nor used to measure value.

Honey is not used to measure value.

It's sticky but not brown.

Honey is not brown but it is sticky.

Clad in warning colours.

Yellow is often seen as a color of warning, a reason why construction hats are yellow.

But ever so good to eat.

To some people, Honey is delicious.

Often found in winter

Honey is found in many households in the winter.

To make a colder nose

Honey is often used as a treatment when you are sick with a cold.