I've tried all sorts of products but always revert to good old Hammerite - the thicker the better because even grass seems to be abrasive over time.
Spray or brush - just don't expect a showroom finish!
Smoothrite may be better than the hammer finish, but at least it dries nice and hard....fairly quickly too.
Hammerite actually do a stonechip too if you want to use that.
John
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