Gelcoat over epoxy?

[pelican]

Originally Posted by bly

If it has not blushed on its own? It usually happens very quickly in spring weather conditions. To mimmic that I think I warm it a bit with a heat gun or quartz light. then spray it with some water and let it cool and sit over night. Then warm one more time the next day if it has not blushed. sometimes it takes a second try to get it out. Just wipe with clean rags and let dry and then sand a little bit.

excellent advice jay

a guy i know,"mad mike" - he plays WAY above his skill level - he grabbed some products from me to make "gutters" on his shamrock - a few days later,he returned and complained "that stuff you gave me never set up" !? - i asked him what happened and how he applied it - he explained...the i aksed him if he removed the blush from the epoxy ? i got the blank stare...
he used west system,and he was also using a chopped strand putty over the west...not really sure how he made out with the mess he created - somethings are better unseen...

[shine]

I can help on thi one

gelcoat/polyester WILL cure over some epoxies. You have to make certain its compatible. The epoxy has to be completely cured too.

Do not mix epoxy outside of its designed ratio (hot), all your doing there is introducing more hardener molecules than needed and the epoxy will not cure fully or even at all. The hardener in epoxy is not just a "catalyst" like in polyester, its actually part of the combined epoxy molecule. Catalyst for poly basically "tells" the polyester molecules its time to become hard. Epoxy resin and hardener are more like couples at a dance, mix in too many males or females and you end up with leftover resin or hardener with no where to go = soft epoxy.

[strick]

Originally Posted by shine

Epoxy resin and hardener are more like couples at a dance, mix in too many males or females and you end up with leftover resin or hardener with no where to go = soft epoxy.

Back in the day we had no problem with the left over females

strick