I'd really appreciate some help with the best way of cleaning something that looks like sap from my car. I think we picked it up a few weeks back on a trip to Sydney.

Here's what it is like:

- it is clear,
- when it first appeared, it had the consistency of wax but it has hardened in the colder weather,
- I've pushed a bit with a fingernail. The top layer disintegrates into a white-ish powder, but then leaves a smear mark,
- there are about 12-15 of these spots over just one section of the bonnet.

Any idea on the best products to use for this. I would prefer something easily available (ie. in retail outlets) but I guess if the best has to be ordered in, then that's what I will do.

Thanks