You’ve got a couple of options:
- A 1:10 mix of cheap vodka (cheap, unflavored, undrinkable vodka) and water in a spray bottle. Spray down the blazer, inside and out, and either toss it in the dryer for 30 minutes on low, or leave it outside in the sun for a few hours. (This is an old costumers’ trick, and is how I used to get club smoke out of my velvet dresses Back In The Day.)
- Get a Dryel “home drycleaning” kit (you want the “starter” kit). Use the booster spray on any stained places, thoroughly soaking them. Then toss the blazer into the special dryer bag, put one of the Dryel sheets in the bag, and toss the whole thing into the dryer for 30 minutes on high.
The one benefit the Dryel kit has over the the DIY vodka/water mixture is that the booster cleaning spray is AMAZING. So far, the only things I’ve not been able to remove from white fabric using it are chocolate and blood. (And OxyClean or similar works on those.) (Look, I occasionally have … issues with my gothic heroine nightgowns, okay?)