Mike S said:Get some peel ply, put it on the wet layup, and roll or squeegee it on.
You can come back in a day or ten years, remove the peel ply, and do the next layup. The surface will be ready by just removing the peel ply, sand any shiny spots.
The above is for epoxy-------------for most polyesters, things are a bit different, as they contain a wax and you really need to sand the surface before doing a new layup--------or just do all the layups wet, dont let the resin set up between layers.
Good luck,
AlexPeterson said:Mike, I believe you have this reversed - epoxies blush an amine of some sort to varying degrees depending on the epoxy. This is a wax like stuff that is easily washed off with soap and water, but will reduce the bonding between layers. The time between epoxy layers will probably vary depending on many variables, probably best to talk with the manufacturer.
See:
http://www.epoxyproducts.com/blush4u.html for more info.
As John says, I find it's easier just to use epoxy (especially the WEST products)jcoloccia said:You have to have some sort of top coating on the polyester or it will never cure. The top layer will forever be gummy and totally unsandable. The wax forms a protective layer that keeps the atmosphere out and allows it to finally cure. I've heard that some people use laminating resin (the stuff without the wax) even on the top layer and then put plastic or something on top to allow it to cure hard but I've never done that myself.
The easiest thing to do is just not use polyester at all and use epoxy instead.