Finishing
Please share ......I could use a less work method for fibreglass
Whoever came up with it, it works.
However, it's work no matter how it's done.
I find the method leaves far fewer imperfections.
Lots of detail on my blog. Feel free.
http://wirejockrv7a.blogspot.com
Here's a short version with some changes from how others do it. This assumes a finished fiberglass part.
-Mix micro. I dilute 10% by weight with Denatured Alcohol. I tried all the solvents and it worked best. It allows more micro in the mix and a thinner consistency. More micro means it sands easier after curing. The caveot is the alcohol evaporates quickly so you have to work really fast. Squeegee a layer all over the part and cure. Easier to work small batches. If it gets chunky, stop and mix another batch.
-Block sand with 40-80 till the rough areas are gone and it's getting close to flat. Switch to finer grit to make it smooth. Use whatever forms available to get the surface flat. PVC pipe, birch plywood, rubber block, etc. Never use a bare hand. It causes surface irregularities.
-Mix neat epoxy and squeegee it on forcing into the surface. Let it cure 30 then repeat. Some prefer to roll the surface with a dry roller for texture. The idea is it helps see the surface go flat when wet sanding next step. Your call. I prefer to brush it on with a chip brush.
-Block sand. Wet is easier. No bare hand. Don't break through the epoxy.
-Apply a primer. I prefer two brushed coats 1 hour apart. Cure
-Wet sand to 220.
-Fill any imperfections with a glazing putty. Cure
-Wet sand to remove glazing leaving imperfections filled.
-Prime and paint.
-Cut& Buff