Hello Volfan
…anytime.
Have you tried to send in the info to the actual Graco web site?
Next…I do not know the ingredients to seal coat…or the filter requirements, screen sizes, tip sizes…blahblah…
It may be one of those things that is possible but, you do not want to try. The money, risk of unknown, time involved…etc.
You may as well buy a squeegee.
Next…what do you use the 3400 for? Is it to stripe parking lots? Is it to spray decks…anything?
Let me know.
Dan
