PattheCat Posted October 12, 2021 Share Posted October 12, 2021 Hello. The question is in the title, but more precisely my problem lies with Mr. Surfacer 500 and Perfect plastic putty. They are less than a year old. Jar/tube always closed after use. - Mr. Surfacer is thickening and now takes a longer time to fully harden - PPP is not completely dry but not fluid anymore, It's now behaving like slightly wet sand aggregates. On the other hand I've got a tube of Vallejo plastic putty and Tamiya White putty that are still behaving as new well after over a year. Any idea what "thinner" I could use to make these still usable? Thanks in advance. Pat. Link to comment Share on other sites More sharing options...
Dave Swindell Posted October 12, 2021 Share Posted October 12, 2021 Mr.Color Thinner should sort your Mr. Surfacer 1 1 Link to comment Share on other sites More sharing options...
bentwaters81tfw Posted October 12, 2021 Share Posted October 12, 2021 water for PPP 1 Link to comment Share on other sites More sharing options...
PattheCat Posted October 12, 2021 Author Share Posted October 12, 2021 41 minutes ago, Dave Swindell said: Mr.Color Thinner should sort your Mr. Surfacer 13 minutes ago, bentwaters81tfw said: water for PPP Thanks, I've got Mr. Color levelling thinner. I'll give it a try. Link to comment Share on other sites More sharing options...
Pigpen Posted November 24, 2021 Share Posted November 24, 2021 I find my Surfacer500, which I use as a paint on putty, needs freshening up every few months, I think the solvent is so volatile it evaporates during the short time the bottle is open. On the basis of what it smells like I use cellulose thinners from Wilkinson's and it still seems to have the same characteristics even after several years. I like PPP on some awkward seams as it's easy to clean up with a cotton bud, but I too find it goes grainy and I bin it and buy a new tube once a year. 1 Link to comment Share on other sites More sharing options...
Lewis95 Posted December 21, 2021 Share Posted December 21, 2021 Another tuppence, I haven't had the need to check on my Mr Surfacers (I have several) as they haven't thickened BUT I have read in several places that when they get a bit thicker, they can still be worked with fairly easily. Some even prefer to take the lid gunk instead of from the jar for this purpose. Not sure why but I think it may be because it's more manageable. PPP - I've had 1 tube die on me within 6 months, I have another and tend to use a damp toothpick or a metal dental pick dipped in water now my 2nd tube has gummed up a bit. Still works great with this method as you hydrate what you use, as you use it. 1 Link to comment Share on other sites More sharing options...
Pin Posted December 21, 2021 Share Posted December 21, 2021 well, basic chemistry - cellulose thinner. 1 Link to comment Share on other sites More sharing options...
colin Posted December 21, 2021 Share Posted December 21, 2021 1 hour ago, Pin said: well, basic chemistry - cellulose thinner. It may skin over very quickly with basic cellulose thinner, MLT isn't as hot so the drying time is a little longer, giving you more time to apply it 1 Link to comment Share on other sites More sharing options...
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