I do that too.  I'm slightly more pikey though as I use gum tape on both ends and pull one end open and then use the same tape to seal it back up for the next moulding.  Works fine!  I dont even put plastic over the breather, I just shake the shards of cured resin out of the bag.

Being the cheat bastard that I am, I always reuse my (envelop) bag. Sealent tape on one end, reuseable snap lock on the other. Before I seal the bag, I drape a piece of the cheapy, 1mil plastic from Home Depot over bleeder and nothing sticks to the bag. Usually get 6-8 pieces from one bag.

Mark T.

Don't try using a DA sander with 120 grit on your curved part!

Doh!

Took many hours to get the scratches out.

Not the worst and hopefully the wife won't come on here, but ran out of talc the other day when mixing up bog so stole a bottle of Johnson's baby powder from our nursary and used that instead, then denied all knowledge of where half the powder went.

I have used easy lease on one of my bonnets and it gave it a hell of a shine, however it haven't driven the car since so not tested its anti dirt properties!

I'm rather suspiscious that car waxes and mould waxes are rather similar in composition.  I have wondered how my paint would fare with a coat of easylease.  Might also help get brake dust off the wheels!

Yeh I didn't really consider reusing the bag too dodgy, more the sealant tape. Used to have a big ball of used tape that I cut chunks from. Just had to watch out for the fragments of cured resin, they weren't friendly for leaks

I always re use bagging! Didn't realise it was pikey!

Reused bagging tape and vac bag once... Worked fine  

I once used car body polish and wax as release agent for a bonnet I was doing, and it actually worked really well!