Originally Posted by Cadence
You have that right. Poly is only good laid up wet or uncured.
I do repairs
with polyester all the time. Depends on the project
. There are advantages and disadvantages of each. I actually favour polyester for a number of reasons.
No problem if a quality unwaxed polyester is used.
Agreed that a cross-linked bond is superior, but you just can't get this with a repair (using either material).
For both polyester and epoxy
, the key is to key. Leave the surface very rough (angle grinder rough). Then blow it off, and wipe it down with acetone (2 rag method).
The polyester manufacturers do not market to the DIY crowd nearly as well as some epoxy
manufacturers, so you don't get the same level of instruction/support, but quality polyester can work just as well, done right.
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