Yeah, tried that too. I have noticed that it does soften them up and help. My coarse hairs still jam and catch in the disposables, and snag in the electrics.
Might I suggest going OLD school - not just shaving in the shower, nor just splashing ones face with water - the way the classic straight razor wet shave is done... I too have 80 grit facial hair. (By the way, if you ever have the opportunity and funds to get this done at a true old school place, do it, it is a sublime experience http://www.truefittandhill.com/barbershop/services-pricelist.html
1. Run scalding hot water, literally to the point of painful for you to touch.
2. Run hand towel (NO, not a washcloth, this has to be a large towel) under the scalding water.
3. Wring towel, and proceed to place the middle of the towel on the point of your chin, then wrap ends up around your face/cheeks/forehead.
4. Wait 120-180 seconds until skin peels (I joke, not quite that hot) wait until the towel cools, remove, and set nearby.
5. Run scalding hot water again.
6. Place pre-shave oil or lotion on face.
7. Repeat scalding towel on face procedure
8. Shave using sharpest blade and best lather possible
9. Use horrifically stinging alcohol based aftershave. NOTE - this instruction is controversial. Modern skincare (mostly based on safety razor use) says alcohol dries your skin and leaves you looking older. Old school says alcohol seals and sanitizes small cuts, refreshes, and allows clear pores, giving hair more opportunity to grow out as opposed to ingrown. My 2 cents, I don't care about looking older with slightly drier skin, I have course hair that can grow in and wish to avoid it if possible, I like the feeling and smell, and my razor is so sharp I worry much less about it anyhow... If you like alcohol aftershave I am recommending http://www.captainschoicestore.com/
local guy, straight razor nut, great product, reasonable price. Particularly, I love his super extra strength rear end whupping product http://shop.captainschoicestore.com/Cat-O-Nine-Tails-The-Cat.htm
Disclaimer - no affiliation other than an extremely satisfied customer.
Try the old school, it solves a lot of problems caused by modern techniques/science/crap products!!!