I never spray it directly on the saddle but on a rag and then apply it to the saddle. Big avantage: easy to find, easy to buy, efficient and cheap. But I see you found another product which will make the job.
BTW, I have been using ACF50 for years and it is very efficient. Now, I use Rust Check. There are 2 products: the green and the red. The red is liquid and is almost identical to ACF50, and it gives me equal results. The green is more like a grease and will stay much longer on certain surface like the underneath of a sidecar, or the mudguards. Both can be purchased - again- at Canadian Tire which is easy for me.