Can you use acetylene regulator for propane?

[OneWelder]

I can tell you my experience - I have used both Acetylene and propane since the the sixty's - I have never had a problem swapping Acetylene to propane reg
As far as the hoses go well on one of the trks three of the four hoses have been on there since 1990 . Hoses are not cracked , are still pliable in fact show no signs of there age ( propane on the trks - Acetylene in the shop)
- hoses are the R
Thats just my experience you should do what you think is right