Originally Posted by JSauls
It won’t hurt the outside of the sign will it? The inside will not be seen.

The solvent seems to leave a slight mark wherever it sits, it's minor though. It is best to have a little bottle and a needle so you have fine control wicking it into the cracks, that gives you best results.

I've bought this kit from amazon with good results. Comes with solvent and a little bottle.

https://www.amazon.com/dp/B0149IG548?ref_=ppx_hzsearch_conn_dt_b_fed_asin_title_4

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