Yake Bait Posted March 29, 2007 Report Share Posted March 29, 2007 Wondering if any sanding is required to bond the second coat to the first? Thanks Quote Link to comment Share on other sites More sharing options...
Lure--Prof Posted March 29, 2007 Report Share Posted March 29, 2007 If it is totally cured, I would wipe thoroughly with alcohol, scuff the surface (I personally like 800 grit for this), and clean again with an alcohol rag. This helps eliminate amine blush residue problems. You're ready to recoat. Dean Quote Link to comment Share on other sites More sharing options...
RangerZ Posted March 29, 2007 Report Share Posted March 29, 2007 I do the same. Light sand, wipe with alcohol and recoat. The next coat will cover any sanding marks. Quote Link to comment Share on other sites More sharing options...
doomdart Posted March 29, 2007 Report Share Posted March 29, 2007 I have done both with and without sanding the base Devcon coat, and have not noticed much difference either way. However, the alcohol wipe definitely will remove dust/oils, etc. from handling. Both Dean and Ranger are right that light sanding will be invisible through the second coat, so I can't argue with sanding. Might help even everything out and surely will not hurt the bond between coats. Quote Link to comment Share on other sites More sharing options...
spare tire Posted March 29, 2007 Report Share Posted March 29, 2007 I also light scuff between coats. I also think this helps the 2 coats bond better. Quote Link to comment Share on other sites More sharing options...
philB Posted March 30, 2007 Report Share Posted March 30, 2007 Hi Pete I always rub down with 700 grade 'wet n dry' paper the stuff they use on car paint finishes) this has an alarming effect on the clarity of the finish almost obliterating the paint job underneath but the next coat of epoxy brings the clarity back and you would never know it had been sanded at all, I then clean with alcohol before the second coat. It is however not recommended to coat over a fully cured coat of epoxy because you end up with one coat on top of the other and it is never fully bonded. philB Quote Link to comment Share on other sites More sharing options...
BobP Posted March 30, 2007 Report Share Posted March 30, 2007 This question came up a couple of years ago on a rod building site. The answer from a guy who developed finish epoxies for a living was that if you recoat within 24 hrs, the 2 coats become a single mass. Epoxy cures to close to "final hardness" in 24 hrs but may continue curing for as long as a week. That said, I lightly sand the first coat. First, it points up any goofs or high/low points. Second, you can see better where you need to brush if you're coating a matte translucent surface versus a gloss transparent surface. Quote Link to comment Share on other sites More sharing options...
Muskiefool Posted April 1, 2007 Report Share Posted April 1, 2007 steel wool and 220 for any rough patches if they are present has worked well for myself Quote Link to comment Share on other sites More sharing options...
Bowman Posted July 12, 2007 Report Share Posted July 12, 2007 If I use D2T, how long between coats should I wait? Bo Quote Link to comment Share on other sites More sharing options...
fatfingers Posted July 12, 2007 Report Share Posted July 12, 2007 I also sand between coats only when I have an flaw of some type that I wish to remove by sanding. I also apply the second and third coats within 24 hours, usually within 8 or 9. Quote Link to comment Share on other sites More sharing options...
