nugget
Established Member
Hi
I need some HELP !! having a bad day so far....
I'm finishing some wenge with plasti-kote polyurethane spray cans (from B&Q)
So far -
Sprayed one pretty heavy coat to act as a sealer to fill the open pores
Left one week to dry, temp has been around 10 deg can does say min 20deg
Sanded flat without getting back to wood but pores filled nicely, no chemicals used to clean off just dusted heavily
Sprayed again with same varnish but new can (temp today 16deg) with light but wet coat and straight away the finish reacted like a chemical reaction raising and cracking !! not all over just in small patches.
I've finished other woods including oily rosewood like this with very good results and no issues and have sprayed is similar or lower temps.
Please help -
Is it the wenge? if that was the case surly the sealing coat would have reacted worse
Is the the lowe temp? I cant see why this would cause it to react so quickly and havent had this before
Chemical reaction - didnt wipe down with white spirits or cutting compunds etc, same make of varnish but different can, could it just be a bad can? I have sprayed a small offcut with the same new can and it looks ok!
Bad technique?
any suggestions, I'm going to have to wait for it to dry off then sand back to the wood and start over again, problem is I've only got 2 weeks till the customer is coming!
Thanks
I need some HELP !! having a bad day so far....
I'm finishing some wenge with plasti-kote polyurethane spray cans (from B&Q)
So far -
Sprayed one pretty heavy coat to act as a sealer to fill the open pores
Left one week to dry, temp has been around 10 deg can does say min 20deg
Sanded flat without getting back to wood but pores filled nicely, no chemicals used to clean off just dusted heavily
Sprayed again with same varnish but new can (temp today 16deg) with light but wet coat and straight away the finish reacted like a chemical reaction raising and cracking !! not all over just in small patches.
I've finished other woods including oily rosewood like this with very good results and no issues and have sprayed is similar or lower temps.
Please help -
Is it the wenge? if that was the case surly the sealing coat would have reacted worse
Is the the lowe temp? I cant see why this would cause it to react so quickly and havent had this before
Chemical reaction - didnt wipe down with white spirits or cutting compunds etc, same make of varnish but different can, could it just be a bad can? I have sprayed a small offcut with the same new can and it looks ok!
Bad technique?
any suggestions, I'm going to have to wait for it to dry off then sand back to the wood and start over again, problem is I've only got 2 weeks till the customer is coming!
Thanks