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Corsa Sport » Message Board » Help Zone, Modification and ICE Advice » How long should P40 take to dry????? » Post Reply

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RichR

posted on 18th Jul 04 at 22:14

the top layer is still tacky because it actually takes 6 weeks for all of the styrene to release from the resin - however it set to "touch harden after about 30 mins to a few hours


I wouldnt try sanding it - if u have to - uve used to much - skim with P40 to bridge whatever it is ur doing - then skim over that with a fine layer of p38 filler- and sand the filler flat


Kris TD

posted on 18th Jul 04 at 21:50

you will need to use something like 80 or 120 grit on fibreglass or you will be there forever, you only use 600 grit for finnishing filler.


Graham

posted on 18th Jul 04 at 18:52

thanks will, 600 grit wet/dry paper will shape it ok wont it, and remove the orange peel effect off the piece, then what type of filler primer would you recommend i use to go over this?


Amavi Automotive

posted on 18th Jul 04 at 18:50

P40 will remain slightly tacky for ever, as the resin part of the composite is polyester based, when It cures it will have a slight stick to it, unless it is mixed with a flow coat or wax soloution, as you do when laying up the last glass fibre laminate.

if its hard, and doesnt clog the paper too much when you sand it, its cured properly.

hope this helps.

Will


Graham

posted on 18th Jul 04 at 17:58

quote:
Originally posted by JOPO
dis it matter wit yev got if ye canny rub it yit loll


didnt understand a word of that :lol:

if your on about it doesnt matter what type of paper i use, techniquly your right, but if i use the right stuff then it saves hours in time and loads money too :|


JOPO

posted on 18th Jul 04 at 17:52

dis it matter wit yev got if ye canny rub it yit loll


Graham

posted on 18th Jul 04 at 17:27

nah its not really pink, its kinda erm dunno how to describe it, but found out i got 800 wet/dry fine and not 600 wet-dry :mad:


JOPO

posted on 18th Jul 04 at 17:21

if ye used too much hardener it wont harden right either lol is its really really pink then probly better off startin agen lol


Graham

posted on 18th Jul 04 at 17:04

i used a fair bit of hardner, and mixed it up very well, ive jst started sanding down and its gone ok.


AdiSRI

posted on 18th Jul 04 at 16:40

depends how much hardener you put in it.

Between 30 mins and 24 hours id say.

If it is tacky after 48 u didnt use anything like enuff hardner, or you didnt mix it properly.


Graham

posted on 18th Jul 04 at 16:35

its been 48 hours now and its still tacky slightly. so im guessin i canna sand it back yet :(