Will fiberglass resin destroy MDF?

Will brushing fiberglass resin on MDF destroy the MDF?  Its wet?  If you get MDF wet won't it expand? 12 volt rules

no, it doesnt hurt it at all...in fact, there are alot of people who swear they get anywhere from a tenth of a db to 2 or 3 db more out of their enclosures for having done this... I havent yet tried this in any of my installs, because I usually do the pods before the boxes, and am too lazy to mix up another batch of resin for the sub box...but the theory is stiffening/strengthening the box, and it is reasonable IMO that this could work...I dont know about extraordinary gains, but I could see maybe up to 1 db out of a box that was properly built in the first place...

does not damage the mdf in any way, however fiberglass seems to fall off mdf after drying, they do not stick together very well. it wont make the mdf expand cause its alot more dense that water so it cannot seep into wood like water can.

Thanks for the great info. Saved me alot of time and money!12 volt rules

resin won't separate from the mdf unless you go really thick.  a thin layer from the fleece or mat onto the wood helps to hold the structure together.  that's always worked for me.