I like the resin, but I've read that it can react to oil/petrol/ brake fluid. I've eaten away several chunks of tarmac for the same reason.
Concrete/gravel is a lot more resistant.
Would not be keen on gravel in this situation - some people along the road have it - both gravel in two houses and slate chips in another - it is a blessed nuisance as it spreads all over the pavement and makes walking past or running past a nightmare - nearly sprained an ankle on it today when a stone shifted when I trod on it. Concrete also is not allowed in some areas now as it does not let the water soak away.
The resin is resistant to most substances and is easily patched if a major problem. I`ve found oil etc. washes off quite easily with a bit of detergent & water.
