Looking at doing some front fenders for my car, The fenders are about 5 feet long and about 20” high, tooling should be easy as the originals were made from vacuum formed acrylic with a pressed in fiberglass reinforcement, this means the part s were designed with no mold lock. I have genny’s I pull the molds off. The genny parts are relatively heavy and are 3/16 thick. There is about a 40” section in the middle of the fender that is basically an unsupported span. Y question is what should be used for reinforcements and resins, clear Gel is a given, and the first layer a 2X2 5.7 oz for appearance, next should prolly be a veil or mat followed by a 45 of weave either glass or CF. what is you opinion on reinforcements and how many layers, weight is a factor and any improvement is welcome but not the main target, these are mostly for appearance, I know kind of Rice but I do plan on doing the entire body as it is an all glass car.
Resin choice is next, should I stay with epoxy or do VE or PE, piece is a factor but strength and durability are more important. Most chop mat is not compatible with epoxies but some continuous strands are. I do plan on bagging these and have Gast pump already. This is street driven car so it must withstand normal (and some more) vibrations, as well as fuel and exhaust vapors.
I’ve worked with glass for more years than I can remember, I am not a novice when it comes to mold making and laminating just to CF reinforcements. In Cf is it bad to lay weave on weave like in glass or does it not matter as much in CF. If it will help I can take some pics (front and back) of a genny part to show what I’m up against the fender does have inner reinforcements that are “glued” on and the will be reproduced as well.
Any guidance to reduce my scrapping parts is appreciated
Rick
I think you oughta try VER. Since you’ve been doing glass for a long time, you are probably very familiar with PER. VER works the same way except it has the strength characteristic close to that of Epoxy. Normal epoxy is strong, but will break down under UV over time. Unless you use the clear laminating epoxy that I sell here 
wink wink.
All kidding aside, you can lay carbon on carbon without a problem. If you can just stick with all carbon that would be even better. Otherwise I would just do carbon >> 2oz mat >> 8oz cloth. You can reinforce more if you feel like afterward.
Evan
ya sometimes I think I am TOO familiar with PER 
. I will do a smaller test piece first like the door sill plate and see how i like the stiffness and wieght.
I agree VER is much better. You’ll have longer work time as well.
Plus it’s a better high jk.
I always wear a fresh air respirator, I had a bad experience breathing paint fumes and really f’d up my lungs and almost croaked, gained a real respect for breathing.
Now I don’t feel like such a retard 
I had kidney failure because of PER fumes, in and out of hospital for a month and a half. Now everythime I get just a little PER in my system my stomach cramps to the point I have to leave