As mentioned in another thread, yes you can help out as a TA Soldier.
The process includes a spell as a Civilian Assistant until you do "modules" (a series of training weekends), and some paperwork goes through. You should then be made a "PI" (Probationary/Potential Instructor), and the next step is an ITC run by Cadet Training Teams around the Country. This entitles you to promotion to Sergeant Instructor. There is also a CRB in there fairly early on which apparently takes ages to get through.
After that various courses... Frimley park within 2 years of your ITC doing an AITC is whats aimed for though.
Your experiences will no doubt be useful to Cadets but the big thing that ex-Regular or TA people need to remember is that Cadets is a youth organisation. We're all up for acting Army and being military... but we dont go in for the beastings and constant old war stories do get old real quick
aka dont walt it infront of Cadets coz we dont like it either. lol.
Sorry noticed there your point of less likely to "walt" if ex-service. Was merely talking about the similar behaviour, not accusing of actually doing it.
Saying that I've seen a few instructors that could quite easily pass as "walts" even though theyre ex-service.
I think the ACF also use qualifications if they are kept valid from previous service, Signals qualifications are definately useful as lots of places dont always have an abundance of Signals Trained let alone Qualified people as an example.