Best price: 1.25 (ebay shop)
Type: Sponge with one abrasive side
For: Quite good, cheap
Against:Not as effective as other pads
The rough side of the sponge looked like it would scratch paintwork, but fortunately it didn't. It did, however, cut through dried-on insects with only water. Does not buff to a shine without a spray and would be better used with a liquid remover for an effective cleaning combination.
Cheapest product on test, but not widely available.
Ease of Use:
Straightforward and relatively quick even, without a spray.
Safe to use on all finishes and in dealing with a range of surface deposits.