Home |
Search |
Today's Posts |
#1
posted to rec.boats.building
|
|||
|
|||
Epoxy blush stragtegy
My boat got rained on just after I applied the finish coat of epoxy.
Needless to say, I have an amazing case of blush. I have had terrible luck in the past trying to scrub/scrape/wash blush off. Has anyone tried heating the epoxy with a heat gun before scrubbing? Does it help? Might it cause some new problem? (Glass falls off, blush is driven deper into the epoxy, etc.) Patrick |
#2
posted to rec.boats.building
|
|||
|
|||
Epoxy blush stragtegy
Patrick Crockett wrote:
My boat got rained on just after I applied the finish coat of epoxy. Needless to say, I have an amazing case of blush. I have had terrible luck in the past trying to scrub/scrape/wash blush off. Has anyone tried heating the epoxy with a heat gun before scrubbing? Does it help? Might it cause some new problem? (Glass falls off, blush is driven deper into the epoxy, etc.) Patrick -------------- way are you using blushing epoxy when there are no blush epoxies available? paul |
#3
|
|||
|
|||
Quote:
---Joel--- |
#4
posted to rec.boats.building
|
|||
|
|||
Epoxy blush stragtegy
Patrick:
I think you're confusing 'blush' with "water in or on the epoxy before it's cured". In my experience, amine "blush" - a tacky, waxy feel to the surface of a *cured* epoxy surface, is easily removed with warm water and a scotch-brite pad, a nylon scrub brush, or any other "kitchen and bath" cleaning appliance (and a little elbow grease). The key ingrdiant is water, as the 'blush' is water soluable. With most of the epoxies I've used, this scubbing action causes a light, white 'foaming' of the surface being scrubbed which one then wipes off with an absorbent towel. An easy, low effort task. On the other hand, when working over large epoxy layups - especially in the summer months - I often can't keep (despite my best efforts) sweat from dropping off my brow onto the fresh epoxy/glass surface. One can easily see these sweat bombs, as the area where they land turns white, and no ammount of additional epoxy slathered onto the "sweat spot" will cause it to vanish. One or two of these in a large layup is NBD, but if the entire surface of your project got wet, I think you're hosed. My sense is that, in this uncured state, the water dilutes the amine 'hardner' in the epoxy matrix; recall that all epoxies consist of two parts: Resin (not water soluable) and hardner (definately water soluable). Hence, the rain on your uncured epoxy disrupted the chemical properties of your epoxy system, and no ammount of praying will fix it. Time to get out the grinder, and invest in a tarp... Mike Worrall Los Angeles |
Reply |
Thread Tools | Search this Thread |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Forum | |||
Epoxy or Polyester for Fixing Rotten Core on Deck? | Boat Building | |||
Thinning epoxy barrier coat | Boat Building | |||
Epoxy vs. Polyester | Boat Building | |||
Epoxy fibreglass on top of epoxy primer | Boat Building | |||
nu2 woodworking - my epoxied wood is delaminating,.. | Boat Building |