How to prep fiberglass cart for painting

[ehadams]

I am getting ready to paint my 81 Harley 3 wheeler.

The fiberglass is pretty rough. Running a bare hand over it can give some fiberglass splinters.

What sort of recommendations does anyone have to prep this body for paint?

Should I just sand and primer?\

Do I need to put some resin on it as it seems very dried out?

I will be using House of Kolors for the paint. I have some left over from a motorcycle project that I will be using.

Thanks

Eric