I think he was asking about the ipe that I used. If so, ipe is an extremely dense and heavy wood usually used for high end decks. Really has beautiful grain and color. Both when stained or left natural (turns silver). I'm still monitoring it on my boat. Some seems to be doing OK, some is checking worse than I wanted but still in one piece. I varnished one piece of toerail to see if it holds up better and it does seem like its doing a little better, but I wasn't really looking to varnish my wood. It machined really well, but nearly impossible to sand (hence the other name of Ironwood). When I redo the wood I'll probably try using one of the solid trex-type materials. I've seen it used for handrails and it looks pretty decent after "kissing" it with a propane torch.
Oh OK. He was asking about Trex. I think you were the one who gave me the idea of using Trex to replace the Teak under my mast tabernacle. I did that job a couple of weeks ago and it came out great.
In fact, I had to cut 2" off the bottom of my mast because it was all corroded and ready to blow out. Rig-Rite had made up a stainless steel mast plug for the stainless steel hinged tabernacle they installed. Through the years, the two metals set up corrosion.
I took my mast to a marine fabricator on the river and the guy quoted me a price of $300 in labor for sleeving a piece of mast and welding flat stock around it.

So I went home and thought about it and decided to have my son cut 2" off the bottom of my mast and I made up the difference with two 1" pieces of Trex between the tabernacle hinge plate, and the mast plug. I gave the 2" piece of my mast to Rudy and he's going to have some mast plugs made up for the Z-190 masts and hopefully made out of Aluminum. So the Trex under my mast tabernacle plates is permanent but the Trex in between the top plate and the mast plug is only temporary. I'm going to need to make up 2-1/4" in order to get my stays to come right when I get the new mast plug from Rudy.
Right now, my mast looks kind of "fugly" but she sails great! Sometimes you need to just "think outside of the box."
Joe